I'm not sure what your talking about...?
All you need are image files to make a character.
Oh, ok.
A couple questions: how many sizes should characters have total (so that I know how many frames I'll need of the supersized gif)?

And what is the thumbs file that some characters have then?
I thought it was required or smth, so I tried opening it with note pad and it just had garbled nonsense all over it.