I made a backup of Grand Theft Auto, Vice City Stories to test out Swap Magic 3.6 that i just came in the mail today, and i used DVD Decrypter to make it into an iso, and i used the same program to burn it. Ive made all the correct modifications to the ps2. I put the disc in, it loaded. I took it out, put in the burned one, and pressed x, and the message Not a Valid PS2 Disc came up. I tried the other modes, Normal, NTSC, and Pal, but all said the same message. Im using Sony DVD+RW Discs. Slim PSTwo, US. Ive also tried it with Jak and Daxter, but did the same thing.