The disk 2 (game disk) has to be in the drive when you start the game. If the CD check dialog disappears without giving an explicit error message, it means the CD check was OK. If the game doesn't start then, there's a problem with the game itself, not with the CD protection.
The very first thing the game does when started is playing the intro movie. Maybe you can try to play this movie in media player, and see if it works? It should be something like "intro.mpg"... (I don't have the game with me here, I'm not home)
Let us know if this helps <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
