Here’s Chilly Willy’s conversion of ADoomPPC, one of the better DOOM conversions (for the Amiga). It’s got a simple, decent gui that runs before you start the game which allows you to set most of the major DOOM settings. On the Slim PSP, it supports TV out. This arc includes the source, two sets of MIDI instruments and the shareware WAD file. Up to date as of 2007/10/28.

http://groups.google.com/group/chilly-willys-ice-flow/web/doom-for-the-psp?hl=en