Following all the rules, still big problems

[NEO_462]

Ok, I have read all the posts about how you should use good media and write images and burn at 2x. I own FF7 FF8 and Tony hawk pro skater 2.(along with some others). I have been trying to backup Tony hawk pro skater 2 for a long time now; I have gone through over 30 cd-R's and I have read all I can about fixing this problem. My movies and sound(xa files) skip really bad at regular intervals. I have one of those plug in mod chip and when I try to play a video or sound file off the CD-R back-up, they all skip really bad. And it takes forever for the game to start if it ever starts at all. It is not the lens because it plays original psx games perfectly and the CD-R backups still skip when I do the upside down psx lens fix trick. I am using NERO 5.0 (NOT the hacked version). I have also tried some other programs. Is there ANYBODY out there that can help me. I have a 12x 10x 32x CD-RW drive with Burn-proof(whatever that is).