I recently bought a PS1 SCPH-1001 along with an MM3 modchip. After soldering in the modchip, I tried to play some backups, only to be met with much frustration. Some of the burned games stayed at the black PS1 logo screen, while others just went to the PS1's Memory card/CD player screen. Legit copies read fine, as well as music CD's made using the same CD's as the backups, albiet the first few tracks skip. Later tracks run seamlessly, however. I've tried different write speeds, different versions of the disc image files, and different games. Nothing works. I've also tried shortening the wires and checking my connections. Still nothing. At this point, I'm considering just buying a Gameshark and using Unirom.