diff --git a/known_issues.md b/known_issues.md
new file mode 100644
index 0000000..333245f
--- /dev/null
+++ b/known_issues.md
@@ -0,0 +1,876 @@
+
+###### AndroidManifestTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGreen' at <string>:124
+
+###### AVITemplate.bt ######
+    File "pfp/pfp/native/compat_string.py", line 117, in Memcmp
+      raise NotImplementedError()
+
+###### BMPTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGray' at <string>:51
+
+###### CABTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2129, in _handle_while
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1143, in _handle_decl
+        bitfield_left_right=bitfield_left_right
+      File "pfp/pfp/fields.py", line 985, in __init__
+        super(NumberBase, self).__init__(stream, metadata_processor=metadata_processor)
+      File "pfp/pfp/fields.py", line 231, in __init__
+        self._pfp__parse(stream, save_offset=True)
+      File "pfp/pfp/fields.py", line 1023, in _pfp__parse
+        raise errors.PrematureEOF()
+
+###### CAPTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'false' at <string>:778
+
+###### CDATemplate.bt ######
+works
+
+###### CLASSTemplate.bt ######
+works
+
+###### CLASSTemplate2.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2102, in _handle_for
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1143, in _handle_decl
+        bitfield_left_right=bitfield_left_right
+      File "pfp/pfp/fields.py", line 985, in __init__
+        super(NumberBase, self).__init__(stream, metadata_processor=metadata_processor)
+      File "pfp/pfp/fields.py", line 231, in __init__
+        self._pfp__parse(stream, save_offset=True)
+      File "pfp/pfp/fields.py", line 1023, in _pfp__parse
+        raise errors.PrematureEOF()
+
+###### CLASSTemplate3.bt ######
+      File "pfp/pfp/interp.py", line 278, in level
+        res += self._parent.level()
+      File "pfp/pfp/interp.py", line 273, in level
+        def level(self):
+    pfp.errors.PfpError: RuntimeError: maximum recursion depth exceeded
+
+###### CRXTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cNone' at <string>:134
+
+###### DBFTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1064, in _handle_decl
+        field = self._handle_node(node.type, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2038, in _handle_array_decl
+        array_size = self._handle_node(node.dim, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1630, in _handle_binary_op
+        right_val = self._handle_node(node.right, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1686, in _handle_unary_op
+        res = switch[node.op](field, 1)
+      File "pfp/pfp/interp.py", line 1675, in <lambda>
+        "sizeof":	lambda x,v: (fields.UInt64()+x._pfp__width()),
+    pfp.errors.PfpError: AttributeError: 'NoneType' object has no attribute '_pfp__width'
+
+###### DEXTemplate.bt ######
+###### DEXTemplate.new.bt ######
+works
+
+###### DMPTemplate.bt ######
+not tested
+
+###### EDIDTemplate.bt ######
+      File "pfp/pfp/interp.py", line 684, in parse
+        self._ast = self._parse_string(template, predefines)
+      File "pfp/pfp/interp.py", line 828, in _parse_string
+        keep_scopes=predefines
+      File "py010parser/py010parser/__init__.py", line 90, in parse_string
+        keep_scopes     = keep_scopes
+      File "py010parser/py010parser/c_parser.py", line 178, in parse
+        debug=debuglevel)
+      File "py010parser/py010parser/ply/yacc.py", line 265, in parse
+        return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
+      File "py010parser/py010parser/ply/yacc.py", line 1047, in parseopt_notrack
+        tok = self.errorfunc(errtoken)
+      File "py010parser/py010parser/c_parser.py", line 1952, in p_error
+        column=self.clex.find_tok_column(p)))
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:566:55: before: =
+
+###### ELFTemplate.bt ######
+      File "pfp/pfp/interp.py", line 684, in parse
+        self._ast = self._parse_string(template, predefines)
+      File "pfp/pfp/interp.py", line 828, in _parse_string
+        keep_scopes=predefines
+      File "py010parser/py010parser/__init__.py", line 90, in parse_string
+        keep_scopes     = keep_scopes
+      File "py010parser/py010parser/c_parser.py", line 178, in parse
+        debug=debuglevel)
+      File "py010parser/py010parser/ply/yacc.py", line 265, in parse
+        return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
+      File "py010parser/py010parser/ply/yacc.py", line 1047, in parseopt_notrack
+        tok = self.errorfunc(errtoken)
+      File "py010parser/py010parser/c_parser.py", line 1952, in p_error
+        column=self.clex.find_tok_column(p)))
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:353:24: before: char
+
+###### EMFTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2150, in _handle_do_while
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1143, in _handle_decl
+        bitfield_left_right=bitfield_left_right
+      File "pfp/pfp/fields.py", line 1370, in __init__
+        bitfield_left_right	= bitfield_left_right
+      File "pfp/pfp/fields.py", line 985, in __init__
+        super(NumberBase, self).__init__(stream, metadata_processor=metadata_processor)
+      File "pfp/pfp/fields.py", line 231, in __init__
+        self._pfp__parse(stream, save_offset=True)
+      File "pfp/pfp/fields.py", line 1379, in _pfp__parse
+        res = super(Enum, self)._pfp__parse(stream, save_offset)
+      File "pfp/pfp/fields.py", line 1023, in _pfp__parse
+        raise errors.PrematureEOF()
+
+###### EOTTemplate.bt ######
+###### EVSBTemplate.bt ######
+not tested
+
+###### EXETemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGray' at <string>:290
+
+###### EXETemplate2.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'true' at <string>:308
+-> https://github.com/d0c-s4vage/py010parser/issues/13
+
+###### exFATTemplate.bt ######
+      File "pfp/pfp/interp.py", line 1080, in _handle_decl
+        and prev.bitsize is not None and prev.bitfield_rw.reserve_bits(bitsize, stream):
+    pfp.errors.PfpError: AttributeError: 'Array_UChar_2' object has no attribute 'bitsize'
+
+###### FAT16Template.bt ######
+works
+
+###### FLVTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGray' at <string>:48
+
+###### GeoTIFTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtRed' at <string>:1022
+
+###### GIFTemplate.bt ######
+works
+
+###### GocleverTemplate.bt ######
+      File "pfp/pfp/native/compat_string.py", line 388, in TimeTToString
+        raise NotImplementedError()
+
+###### GPTTemplate.bt ######
+works
+
+###### GZipTemplate.bt ######
+works
+
+###### ICOTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cNone' at <string>:119
+
+###### InspectorDates.bt ######
+###### InspectorWithMP4DateTime.bt ######
+      File "pfp/pfp/functions.py", line 74, in call
+        res = self.func(args, ctxt, scope, stream, coord)
+      File "pfp/pfp/native/compat_interface.py", line 620, in RequiresVersion
+        raise NotImplementedError()    
+
+###### ISOBMFTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2129, in _handle_while
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2232, in _handle_switch
+        if expr == cond:
+      File "pfp/pfp/fields.py", line 534, in __eq__
+        val = get_value(other)
+      File "pfp/pfp/fields.py", line 31, in get_value
+        return field._pfp__value
+    pfp.errors.PfpError: AttributeError: 'Array_Char_4' object has no attribute '_pfp__value'
+
+###### JPGTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2129, in _handle_while
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2234, in _handle_switch
+        exec_case(idx, cases)
+      File "pfp/pfp/interp.py", line 2183, in exec_case
+        self._handle_node(stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2078, in _handle_if
+        return self._handle_node(node.iftrue, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2129, in _handle_while
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2075, in _handle_if
+        cond = self._handle_node(node.cond, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1630, in _handle_binary_op
+        right_val = self._handle_node(node.right, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1791, in _handle_id
+        raise errors.UnresolvedID(node.coord, node.name)
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'DK_End' at <string>:1138
+
+###### LNKTemplate.bt ######
+pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cNone' at <string>:10
+
+###### LUKSTemplate.bt ######
+works
+
+###### MachOTemplate.bt ######
+py010parser.plyparser.ParseError: <string>:8: Directives not supported yet
+
+###### MBRTemplate.bt ######
+works
+
+###### MBRTemplateFAT.bt ######
+      File "pfp/pfp/interp.py", line 684, in parse
+        self._ast = self._parse_string(template, predefines)
+      File "pfp/pfp/interp.py", line 828, in _parse_string
+        keep_scopes=predefines
+      File "py010parser/py010parser/__init__.py", line 90, in parse_string
+        keep_scopes     = keep_scopes
+      File "py010parser/py010parser/c_parser.py", line 178, in parse
+        debug=debuglevel)
+      File "py010parser/py010parser/ply/yacc.py", line 265, in parse
+        return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
+      File "py010parser/py010parser/ply/yacc.py", line 1047, in parseopt_notrack
+        tok = self.errorfunc(errtoken)
+      File "py010parser/py010parser/c_parser.py", line 1952, in p_error
+        column=self.clex.find_tok_column(p)))
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:763:1: before: /
+
+###### MIDITemplate.bt ######
+works
+
+###### Mifare1kTemplate.bt ######
+###### Mifare4kTemplate.bt ######
+works
+
+###### MOBITemplate.bt ######
+      File "pfp/pfp/interp.py", line 684, in parse
+        self._ast = self._parse_string(template, predefines)
+      File "pfp/pfp/interp.py", line 828, in _parse_string
+        keep_scopes=predefines
+      File "py010parser/py010parser/__init__.py", line 90, in parse_string
+        keep_scopes     = keep_scopes
+      File "py010parser/py010parser/c_parser.py", line 178, in parse
+        debug=debuglevel)
+      File "py010parser/py010parser/ply/yacc.py", line 265, in parse
+        return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
+      File "py010parser/py010parser/ply/yacc.py", line 971, in parseopt_notrack
+        p.callable(pslice)
+      File "py010parser/py010parser/c_parser.py", line 752, in p_decl_body_1
+        typedef_namespace=True)
+      File "py010parser/py010parser/c_parser.py", line 567, in _build_declarations
+        self._add_typedef_name(fixed_decl.name, fixed_decl.coord)
+      File "py010parser/py010parser/c_parser.py", line 278, in _add_typedef_name
+        "in this scope" % name, coord)
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:391: Typedef 'HTML' previously declared as non-typedef in this scope
+
+###### MP3Template.bt ######
+works
+
+###### MP4Template.bt ######
+      File "pfp/pfp/interp.py", line 684, in parse
+        self._ast = self._parse_string(template, predefines)
+      File "pfp/pfp/interp.py", line 828, in _parse_string
+        keep_scopes=predefines
+      File "py010parser/py010parser/__init__.py", line 90, in parse_string
+        keep_scopes     = keep_scopes
+      File "py010parser/py010parser/c_parser.py", line 178, in parse
+        debug=debuglevel)
+      File "py010parser/py010parser/ply/yacc.py", line 265, in parse
+        return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
+      File "py010parser/py010parser/ply/yacc.py", line 1047, in parseopt_notrack
+        tok = self.errorfunc(errtoken)
+      File "py010parser/py010parser/c_parser.py", line 1952, in p_error
+        column=self.clex.find_tok_column(p)))
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:127:1: before: /
+
+###### NetflowVersion5.bt ######
+works
+
+###### OGGTemplate.bt ######
+unknown
+
+###### OrCAD3.20a_LIB.bt ######
+###### OrCad3.20a_SCH.bt ######
+works
+
+###### OscarItemTemplate.bt ######
+no test data
+
+###### PALTemplate.bt ######
+works
+
+###### PCAPTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2129, in _handle_while
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1064, in _handle_decl
+        field = self._handle_node(node.type, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1427, in _handle_struct_call_type_decl
+        struct_args = self._handle_node(node.args, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1941, in _handle_expr_list
+        self._handle_node(expr, scope, ctxt, stream) for expr in node.exprs
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1346, in _handle_struct_ref
+        sub_field = getattr(struct, node.field.name)
+      File "pfp/pfp/fields.py", line 753, in __getattr__
+        return super(Struct, self).__getattribute__(name)
+    pfp.errors.PfpError: AttributeError: 'Layer_3_' object has no attribute 'L4proto'
+
+###### PCXTemplate.bt ######
+works
+
+###### PDFTemplate.bt ######
+      File "pfp/pfp/interp.py", line 684, in parse
+        self._ast = self._parse_string(template, predefines)
+      File "pfp/pfp/interp.py", line 828, in _parse_string
+        keep_scopes=predefines
+      File "py010parser/py010parser/__init__.py", line 90, in parse_string
+        keep_scopes     = keep_scopes
+      File "py010parser/py010parser/c_parser.py", line 178, in parse
+        debug=debuglevel)
+      File "py010parser/py010parser/ply/yacc.py", line 265, in parse
+        return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
+      File "py010parser/py010parser/ply/yacc.py", line 1047, in parseopt_notrack
+        tok = self.errorfunc(errtoken)
+      File "py010parser/py010parser/c_parser.py", line 1952, in p_error
+        column=self.clex.find_tok_column(p)))
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:4:6: before: int
+
+###### PETemplate.bt ######
+    Error parsing with py010parser
+      File "pfp/pfp/interp.py", line 684, in parse
+        self._ast = self._parse_string(template, predefines)
+      File "pfp/pfp/interp.py", line 828, in _parse_string
+        keep_scopes=predefines
+      File "py010parser/py010parser/__init__.py", line 90, in parse_string
+        keep_scopes     = keep_scopes
+      File "py010parser/py010parser/c_parser.py", line 178, in parse
+        debug=debuglevel)
+      File "py010parser/py010parser/ply/yacc.py", line 265, in parse
+        return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
+      File "py010parser/py010parser/ply/yacc.py", line 1047, in parseopt_notrack
+        tok = self.errorfunc(errtoken)
+      File "py010parser/py010parser/c_parser.py", line 1952, in p_error
+        column=self.clex.find_tok_column(p)))
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:47:83: before: 2
+
+###### PNG12Template.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1925, in _handle_func_call
+        func_args = self._handle_node(node.args, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1941, in _handle_expr_list
+        self._handle_node(expr, scope, ctxt, stream) for expr in node.exprs
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1791, in _handle_id
+        raise errors.UnresolvedID(node.coord, node.name)
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cRed' at <string>:79
+
+###### PNGTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2129, in _handle_while
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1104, in _handle_decl
+        val = self._handle_node(node.init, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1925, in _handle_func_call
+        func_args = self._handle_node(node.args, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1941, in _handle_expr_list
+        self._handle_node(expr, scope, ctxt, stream) for expr in node.exprs
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1791, in _handle_id
+        raise errors.UnresolvedID(node.coord, node.name)
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'CHECKSUM_CRC32' at <string>:52
+
+###### PSFTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1858, in _handle_func_def
+        func = self._handle_node(node.decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1064, in _handle_decl
+        field = self._handle_node(node.type, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1901, in _handle_func_decl
+        params = self._handle_node(node.args, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1877, in _handle_param_list
+        param = self._handle_node(param, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1064, in _handle_decl
+        field = self._handle_node(node.type, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1312, in _handle_byref_decl
+        field.byref = True
+    pfp.errors.PfpError: AttributeError: 'NoneType' object has no attribute 'byref'
+
+###### PYCTemplate.bt ######
+      File "pfp/pfp/native/compat_string.py", line 62, in EnumToString
+        raise NotImplementedError()
+  
+###### RARTemplate.bt ######
+      File "pfp/pfp/interp.py", line 1791, in _handle_id
+        raise errors.UnresolvedID(node.coord, node.name)
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'CHECKSUM_CRC32' at <string>:180
+
+###### RDBTemplate.bt ######
+works
+
+###### RegistryPolicyFileTemplate.bt ######
+works
+
+###### RESTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1926, in _handle_func_call
+        func = self._handle_node(node.name, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1791, in _handle_id
+        raise errors.UnresolvedID(node.coord, node.name)
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'GoTo_rsrc_section' at <string>:5
+
+###### ROMFS.bt ######
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:7: Directives not supported yet
+
+###### SHPTemplate.bt ######
+      File "pfp/pfp/interp.py", line 1791, in _handle_id
+        raise errors.UnresolvedID(node.coord, node.name)
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGreen' at <string>:11
+
+###### SHXTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGreen' at <string>:11
+
+###### SinclairMicrodriveImage.bt ######
+no test data
+    
+###### SRecTemplate.bt ######
+      File "pfp/pfp/interp.py", line 687, in parse
+        res = self._run(keep_successful)
+      File "pfp/pfp/interp.py", line 884, in _run
+        traceback
+      File "pfp/pfp/interp.py", line 863, in _run
+        res = self._handle_node(self._ast, None, None, self._stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 979, in _handle_file_ast
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2129, in _handle_while
+        self._handle_node(node.stmt, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1960, in _handle_compound
+        self._handle_node(child, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1170, in _handle_decl
+        field._pfp__init(stream)
+      File "pfp/pfp/interp.py", line 81, in _pfp__init
+        stream=stream
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 1472, in _handle_struct_decls
+        self._handle_node(decl, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 956, in _handle_node
+        res = self._node_switch[node.__class__](node, scope, ctxt, stream)
+      File "pfp/pfp/interp.py", line 2232, in _handle_switch
+        if expr == cond:
+      File "pfp/pfp/fields.py", line 534, in __eq__
+        val = get_value(other)
+      File "pfp/pfp/fields.py", line 31, in get_value
+        return field._pfp__value
+    pfp.errors.PfpError: AttributeError: 'Array_Char_2' object has no attribute '_pfp__value'
+
+###### SSPTemplate.bt ######
+works
+
+###### STLTemplate.bt ######
+      File "pfp/pfp/interp.py", line 1791, in _handle_id
+        raise errors.UnresolvedID(node.coord, node.name)
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtAqua' at <string>:33
+
+###### SWFTemplate.bt ######
+      File "pfp/pfp/interp.py", line 1791, in _handle_id
+        raise errors.UnresolvedID(node.coord, node.name)
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGray' at <string>:2055
+
+###### TacxTemplate.bt ######
+works
+
+###### TGATemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGray' at <string>:105
+
+###### TIFTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtAqua' at <string>:1017
+
+###### TOCTemplate.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cGreen' at <string>:26
+
+###### TTFTemplate.bt ######
+      File "pfp/pfp/interp.py", line 684, in parse
+        self._ast = self._parse_string(template, predefines)
+      File "pfp/pfp/interp.py", line 828, in _parse_string
+        keep_scopes=predefines
+      File "py010parser/py010parser/__init__.py", line 90, in parse_string
+        keep_scopes     = keep_scopes
+      File "py010parser/py010parser/c_parser.py", line 178, in parse
+        debug=debuglevel)
+      File "py010parser/py010parser/ply/yacc.py", line 265, in parse
+        return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
+      File "py010parser/py010parser/ply/yacc.py", line 1047, in parseopt_notrack
+        tok = self.errorfunc(errtoken)
+      File "py010parser/py010parser/c_parser.py", line 1952, in p_error
+        column=self.clex.find_tok_column(p)))
+      File "py010parser/py010parser/plyparser.py", line 54, in _parse_error
+        raise ParseError("%s: %s" % (coord, msg))
+    py010parser.plyparser.ParseError: <string>:587:1: before: /
+
+###### UTMPTemplate.bt ######
+no test data
+
+###### VHDTemplate.bt ######
+    File "pfp/pfp/native/compat_string.py", line 117, in Memcmp
+        raise NotImplementedError()
+
+###### WAVTemplate.bt ######
+###### WAVTemplateAdv.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'false' at <string>:4
+
+###### WinhexPosTemplate.bt ######
+no test data
+
+###### WMFTemplate.bt ######
+works
+
+###### ZIPTemplate.bt ######
+###### ZIPTemplateAdv.bt ######
+    pfp.errors.PfpError: UnresolvedID: Could not resolve field 'cLtGray' at <string>:125
diff --git a/pfp/interp.py b/pfp/interp.py
index a328051..d1f7c4e 100644
--- a/pfp/interp.py
+++ b/pfp/interp.py
@@ -13,6 +13,7 @@
 import six
 import sys
 import traceback
+import zipfile
 
 import py010parser
 import py010parser.c_parser
@@ -552,8 +553,19 @@ def define_natives(cls):
 		if len(cls._natives) > 0:
 			return
 
-		glob_pattern = os.path.join(os.path.dirname(__file__), "native", "*.py")
-		for filename in glob.glob(glob_pattern):
+		pythonfiles = []
+
+		mydir = os.path.dirname(__file__)
+		if '.zip' in mydir:
+			parts = mydir.split('.zip', 1)
+			zipfilename = parts[0] + '.zip'
+			with zipfile.ZipFile(zipfilename) as myzip:
+				pythonfiles = [os.path.join(zipfilename, i) for i in myzip.namelist() if i.startswith('pfp/native') and i.endswith('.py')]
+		else:
+			glob_pattern = os.path.join(mydir, "native", "*.py")
+			pythonfiles = glob.glob(glob_pattern)
+
+		for filename in pythonfiles:
 			basename = os.path.basename(filename).replace(".py", "")
 			if basename == "__init__":
 				continue
@@ -1196,6 +1208,11 @@ def _handle_metadata(self, node, scope, ctxt, stream):
 
 		metadata_info = []
 
+		if "format" in node.metadata.keyvals or "format" in keyvals:
+			metadata_info.append(
+				self._handle_format_metadata(node, scope, ctxt, stream)
+			)
+
 		if "watch" in node.metadata.keyvals or "update" in keyvals:
 			metadata_info.append(
 				self._handle_watch_metadata(node, scope, ctxt, stream)
@@ -1212,6 +1229,22 @@ def _handle_metadata(self, node, scope, ctxt, stream):
 		#char blah[60] <packer=Zip, packtype=DataType>;
 		#int checksum <watch=field1,field2,field3, update=Crc32>;
 	
+	def _handle_format_metadata(self, node, scope, ctxt, stream):
+		"""Handle format specifiers for fields
+		"""
+		keyvals = node.metadata.keyvals
+		if "format" not in keyvals:
+			raise errors.PfpError("Display format must be set")
+
+		format_type_array = keyvals["format"].split(",")
+		format_type = format_type_array[0]
+
+		return {
+			"type": "format",
+			"format": format_type,
+			"func_call_info": (ctxt, scope, stream, self, self._coord)
+		}
+	
 	def _handle_watch_metadata(self, node, scope, ctxt, stream):
 		"""Handle watch vars for fields
 		"""