Sharkus has updated his port of Ur-Quan Masters for the PSP, heres some info:

Rev 002 (Alpha) - 20060320
Fixed SOME of the stability issues. Melee should work now. There are still some random crashes due to running out of memory. I suggest to save often until I get them fixed... Most of the time you should be able to make it past your buddy at pluto. I also modified the default keys.cfg file to use the O button for the thrust function and the l/r triggers for weapons. IMHO, this makes the game much easier to control. You are welcome to customize the keys.cfg file to your liking.

Download and Give Feedback at the Release Thread Here -->

Thanks for updating this excellent release Sharkus