Mac users interested in How to pack and unpack the ipa files generally download:
Unpack/pack dictionary tool, it supports the following dictionaries formats: DSL + IPA Transcription, XDXF, TI/StarDict, TI/Folder Struct; Core (Perl) requires HFS+. Designed for using with TranslateIt! Deluxe.
It is easy to use and also has a friendly interface.
