Is there a problem copying the game or is the problem playing off the copied disk?
If the problem is with copying try different software. I use CloneCD and BlindWrite Suite religiously.
If the problem is playing the game off the copied disk there's a couple different solutions.
#1: Go to gamecopyworld.com and download a no CD patch. This is an easier way to go.
#2: Use a hook driver type proggie like Insektors or PlayBackup. It's a bit more complicated than a no CD patch and those two proggies don't really like each other but they work.
Hope that helped.