making backup copies of Diablo 2

[fl8tor]

I made a backup copy of Diablo 2 using clonecd and the instructions in the article "backup protected CDs". I installed the game using the copies but when I play the game I get invalid page fault error and make sure original CD is in drive. If I put the original CD in it works fine. My question is can you make a backup copy of Diablo 2 so you don't have to use the origianl discs or patches to modify executables? By the way, I have a Creative 12 10 32 CD RW which CloneCD states is able to handle DAO-RAW.
any help would be greatly appreciated.