I've had no problem in the past making backups...until now. Just got the new Guitar Hero II Encore - Rockin the 80s, and have proceeded to burn no less than 4 coasters. Each time I get "Not a valid PS2 disk." I'm using dvd decrypter to both rip and burn (in iso mode), solid media, and burning at 1x. I've even tried using the cdloader, to no avail. I know the game is brand new, but has anyone else been able to get it to work yet?