all the stuff i found on the psp mouse [i used the search function] was the ball and the jerry rigged switches, the ones where you have to bring it back to center to get it to stop. i dont want that, i want a fully functional opto-mechanical trackball. i dont think im up to an optical trackball, but i know it can be done seeing as from the looks of the inside of my roller ball mice, it seems to put out a digital signal due to infared LED's and a two way opto-transistor. but im not sure how to get that to work with the analog from the controller.