Zatch Bell DFF and MDL issues

[psychonautic]

If you said which games, and/or which platforms they're from, that might help a bit. Looks like you've tried everything though, not sure if I can help much.

Ah sorry. Knew I forgot something. The games are
Zatch bell mamodo battles(Gamecube) uses DFF
Zatch bell mamodo fury(gamecube) uses MDL archives or something. some have files in them some don't.
I looked in the ps2 versions and the file type are the same though unpacking the fpks sometimes made the tool crash. I also found This but they seem to have never finished it...