Bulldog

Ok, I went to GameSpy, purchased GR, downloaded it from GameSpy, and installed it. My friend stole my original GR cd, and I still have the DS CD that came with the package. Now, I got the licence so the game could work, but when I try to install DS, it says that GR needs to be installed, but I have it installed. Do I need some type of file, or something so that DS can find GR?