Model/Anim swapping for Crash 2/3 (PSX)

[Pyrochrome]

So I thought it would be really neat to make Coco 'playable' by replacing Crash's files with hers. I've seen some people make model and animation edits like this, but I'm a little in over my head; I can't find any good tutorials, and CrashEdit is a pain to use. Does anyone have any relevant info? Is there anyway to import custom assets?