well, the first thing you need to do is make sure you downloaded the correct no cd file. It needs to be the same version as your game. Once this is done, you must extract the crack to your game file and replace the original exe with it, once this is done it should work. if this still does not work, get a new crack from
www.gamecopyworld.com
www.megagames.com
or any other place like that, once that is done, it should all work fine