Editor extension for Visual Studio 2010 to support .PKGDEF files. It includes:

Colorizing of keys, value names, values, comments, string tokens, and guids
Syntax validation (showing errors with squiggles and QuickInfo)
Token validation (showing errors with squiggles and QuickInfo)
Token completion (when a ‘$’ is typed) and QuickInfo
Supports the continuation line syntax (i.e., ‘\’ at the end of a line)
Highlights matching braces and quotes
Outline collapsing of values beneath sections (keys)
List errors in the Error List window (and allows double click jump to the associated line)