How to put iso's and cso's on a psp First you need to have a: iso or a cso A psp A usb cable Connect your psp with your computer Then copy your iso/cso go to your psp Make a new folder in the root of your ms named: ISO paste the iso/cso in that folder before you can play your iso/cso go on your psp and press the select button go to UMD ISO MODE and set it to M33 driver