XSp.

…aaaand here’s why modding should always be allowed in all plaftorms:

Ok, maybe you don’t wan’t your PSP to have a mouse port or anything like that, but I guess this little mod shows the talent of modders out there.
I’m one of those persons who can’t play FPS games without a mouse… so this actually looks interesting to me.
HATE analog sticks, but that’s just me. I also know several people who can only play FPS with gamepads…

Source: Gizmodo