i wasn't able to do anything with umdgen either, it doesn't detect my psp, even in a clean un-modded state, and ignores the umd while the cfw way gives me a very easy access to the disc.
googling around doesn't show that umdgen can dump the umds, and i couldn't find anything about dumping umds from a clean, unmodded psp. everything was either for outdated firmware or cfw.
googling around doesn't show that umdgen can dump the umds, and i couldn't find anything about dumping umds from a clean, unmodded psp. everything was either for outdated firmware or cfw.