I'd hate to ask the same thing here too, but I asked on the PSPHardware board on gfaqs, but i'm not getting any responses.
I've heard that if you go to system information and spin your joystick around it will calibrate it. I'm not sure if this is true seeing as how there is no sign of any type of feature in that menu and there has also been no effect afterward. So is there really anything I can do there? Am I just spinning the joystick wrong?
Any information about this is appreciated. :3