PacManFan has just released QuakePSP v0.3 . In version 0.2 he improved the mapping of a few keys based on user feedback, as well as working on a few crash bugs and audio. In this version he has enabled the game console, and fixed many of the menus. Keys can be remapped from within quake, but there are still a few issues saving them. Added an icon and replaced the "pspdev applications" text with "Quake-PSP" Here is what he had to say:

• This is a port of the world renowned FPS Game Quake
• This port is based of off Pocket Quake by Dan East
• This needs to be installed in a folder called PSP/GAME/QUAKE-PSP
• The pak files go in the /ID1 sub folder
  

You can get this file in our PSP Download section [here].
You can get the Kxploit version [here].