I tried a few weeks ago to upgrade my original PSP Phat (one of the launch systems) from its 5.00 M33-3 firmware to GEN-C. Everything seemed to go okay - the firmware was even labeled GEN-C in the system info. However, the machine will not play any GEN patched isos. However, it still plays the M33 isos that worked before it. What's the best way to start over and reflash the system up to the latest GEN firmware. I do have a Pandora Battery, so that wouldn't be a problem. Thanks for your time and help.