lol thanks "captain awsome" thats all gba is though, it's a more compact version of snes, it's just that they made more better games on gba, and you will find that you can get doom on gba
and snes, but the snes version is bigger in size. i know my consoles.
oafan: i can't find the working bios for that so i guess i will never know
yes it is possible to convert roms! i'll will dig up the link for the snes to gba one.
http://snes2gba.vze.com/
if you did get gpsp to work though, i would like to be enlightened.