I thought since the system config menu on the PSPQuake+GP that is hosted on QJ is outdated, id upload the latest configs for everyone to use. Everything you need to play Quake is in the zip. Just extract to PSP/GAME and play. Also please read the readme for instructions like how to play online, controls, etc.
EDIT: The PSP Quake forums are here: http://garretpeters.com/forums/forumdisplay.php?fid=15