you can also find software that will burn the corruped sectors over which is what ps uses for its copyright protection. Not that I would suggest such a thing..
Hi i want to know the same thing a long time ago and now am a expect at ps2 back up playing. Get a swap magic disk there easy and safe to use no mod chips then you can play back ups and if you have a dvd rewiter use dvd-r disk NOT DVD+R you should have a program that comes with the dvd rewiter but if it comes with nero get clone cd you then can make back ups and play them with out breaking you ps2 i do this all the time and a good tip when you buy or rent out a game before playing back it up and just use the copy to keep the real game in good condision MOD CHIPS COST A LOT AND BREAKS PS2 FASTER SWAP MAGIC IS SAFE