I have a no solder mod chip that plays cd-roms in a ps2 with no problem. The problem is that it won't boot ps2 backup dvd's. I have tried booting several different ways but still no luck. The only way I can get a backup to work is put the original in and when it loads up swap it for the backup. Is there any way around this? Do I have to buy something else such as the Magic Swap? Thanks for any information leading to the success of this!