Kewl, phaleux just posted a tut! http://phaleux.com/?p=8
I tried it and it indeed works, plus this will fix the album art issue! Theres a folder called "albums", and it includes all the album art for everything (however for some reason randomly certain ones are locked), so I would guess all you have to do is replace the art.
This is very neat indeed, thanks lpxxfaintxx!
Edit: Hmm, forget the album art, they're in alb files. It might take a bit to figure out how to change them.