Backup of GTA SanAndreas

Am trying to backup my copy of GTA SanAndreas for PC. I am using DVD decryptor ISO read/write and the game installs OK but when I try to play the game I get a message that says "Could not find original disk or authentication code"

 

it has copy protection.

 

yh, u need 2 get a no-cd crack 4rm da net 2 get ur game 2 wrk

 

Cheers guys
Any idea where to look on the web

 

do a google search and write "no-cd crack" next to your game's game, and you should get loads of sites with downloadable cd-cracks.

 

Or you can get it off a p2p sofware

 

For those interested
Have followed the suggestions of all correspondents and now have a fully functioning backup, the original is now vacpacked for future generation gamers.
Cheers
Long live GTA