THANK YOU SO MUCH!:D
I prolly would have never thought of that myself. There is two possiblities of what I think happened. 1) Since I did a full install, that particular file could have corrupted on the install, or 2) seeing as how I installed the game in May and haven't touched it since...
Well... from what I can see there is a small scratch on the very outside of the CD. That's funny, seeing as the only times I have used that CD is the times I have installed the game. I may have had the game for about a year, but I have never played far enough to use CD 3. Anyway, to answer...
Okay... I go and I click on the Breifing Room to play a mission [First mission on CD3 "G'mar 530.4: Operation: Ambush"]. It goes through the short video clip. Then it goes to the ICIS. Right when that starts, it crashes and a box pops up saying:
"Iff::Iff open file...