Ziah when you were having this problem you should have jumped on our forum and asked.
The problem is with the autodownloader crashing when the map in installing and only half installing.
Dont ask me why it comes up with a cd check failed message but what you have to do is if its only
on a certian map you have to go to you my documents / my games / crysis wars / downloads / levels folder
and delete the map and reinstall it. Problem solved.
Cheers
Quacks