Sharkus has updated his port of Ur-Quan Masters for the PSP, heres some info:
Rev 002 (Alpha) - 20060320
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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.