For anyone who wishes to remain legit on official firmware (OFW), but still has that undying, retro itch to jam some SNES action every now and then, then this build of SNES9x Euphoria is for you. There isn't much difference from this version, posted back in February 2011, other than it's signed for OFW. No hacks needed -- just copy the "Snes9x_Euphoria" directory to PSP/GAME, along with some roms under Snes9x_Euphoria/ROMS, and fire it up.
The author of this build promises more updates, aiming to improve emulation speed and also to update the core to the latest version of SNES9x, which is apparently 1.51; this current PSP port is based off the 1.42 source.