If you go to My Computer then click on explore the virtual cd drive there should be a directory in there called crack containing an executable. Simply copy this into the directory you installed the game (overwriting the original file) and it should work.

If there is no crack on the cd, go to www.gamecopyworld.com and download it or also try http://astalavista.box.sk (beware of milicious programs trying to get you to install them before you download the crack!)