It must have error reading from the cd so it thinks it has to go onto a second cd because it cant find a specific file, what did you use to back it up? The protection is Safedisc 2.60.052 i think :S?
Try mounting the image with Alcohol 120 virtual dvd\cd-rom. Use "ignore media type and bad sector emulation" and see if you can install\play from the virtual dvd\cd-rom drive. Be sure that Alcohol 120 is running in system tray m8 (startup). Shoey