I have an extra Phat PSP (original - bought on launch night original LOL). I put it to the side when I got my PSP-2000. However, a few months ago, I tried to upgrade from M33 to 5.50GEN-D(Full). I followed the instructions and everything seemed to work fine. The system info even lists the system software as 5.50GEN-D(Full). However, non of the GEN-D ISOs will work. The M33 isos will work, just like before I tried to upgrade. But nothing GEN. So, truthfully, I have no idea what happened. What is the best way to upgrade the system to the latest CFW? And what CFW should I go with? Any advice would be welcome.