Okay, I've tried everything so far, and every time I hit the install CFW button on the D3 installer, the PSP just crashes and I have to restart it, with no change in the firmware at all. I have myself a PSP-1000. Anyone know how to fix this? Then again, if all else fails, I think I'll just go back to M33. Is it even possible to go back from 5.50 to 5.00 this way, though? Also, does anyone know if gpSP (the latest version) will run on M33 and/or GEN-D3?