StereoMike has released a bugfix version to his previous Doom PSP release.

Release notes:

I’ve found the bug with the screen alignment and the music volume so i’m releasing a fixed version. h ttp://thesaint.mine.nu/~stereomike/doompspb6fix.zip

Changes in Doom-PSP v0.04 S.S b6 fix:

Fixed problem with screen alignment – Was a problem with the memory aligment of the texture.

Increased the music volume to a normal level

http://forums.ps2dev.org/viewtopic.php?t=4521