How to map controls to mouse?

[LunaMoo]

Technically instead of disabling accelleration you could even find how it works and by controlling camera/cursor movement speed and synchronizing it with mouse movement speed you could emulate more or less proper mouse support.

However that would require a custom program to do both translate mouse movement to keyboard presses, detect mouse movement speed and edit speed in psp memory at the same time. I don't remember if lua allows key input or just reading(blah, long time since I used it;p), but if it does, on windows you could do it completely in Cheat Engine and it wouldn't really be that complicated as long as you do know lua and/or asm as well as some general idea about cheating, however it would work only for game it was made for and only on windows which sucks.

I would say it's big waste of time, especially if you would have to learn all the stuff from 0. PSP shooters are very simplified anyway, just play them with real size pad and and it'll already be much easier than on psp(and surely easier than on keyboard), with a mouse it would be like cheating.