Just started getting this message what should I do?I can't play....
Soujnds like you have downloaded a mod, need to find it an remove it
Replace that file from (the genuine) CD1. It has become corrupt.
Place the CD in the ROM drive. When the menu comes up, quit it. Go to 'my computer' and right click the CoD icon, and left click explore. You will see an folder called 'setup'. Double click that folder, and you will see another folder, called 'data'. Inside that is a folder called 'main'. This is where the pak0.pk3 file is. Copy it, and go to where CoD is installed on your hd. Open the 'main' folder, and paste in the copy. You will be prompted to replace the existing one. So so.
Thanx guys works great