Thanks for the replies Chuardo and GameFreakDude. I wish I had known about PictoParty years ago. I'll probably buy that, but also try again to mod G&W using the help that GameFreakDude mentioned.
Found this thread a year or so ago, but was too lazy to attempt any of this.
Fairly new to modding. Anyone have any advice or updated help on how to do this?
I used the quickbms script that kavid gave. After that I used another one for WARC, which gave me a bunch of MSBT files. Tried opening it...