Mohaa deluxe includes expanstion Breakthough.
Anyway all is SafeDisc protected. And reading errors is normal. And yes the cd-rom is slowing down. Read the backup guides, hints and stuff in the stickeys about SafeDisc.
Note:
SafeDisc 3 can be used as the same method as SafeDisc 2 however there are less burners that support SafeDisc 3 (call of duty are protect with SafeDisc 3.10)