Hello people (Firstly I hope im posting in the right section) I have a problem installing original doom 3 game. I originally tried to install a downloaded copy but could not get it to run. I recieved doom 3 for christmas and have not been able to install after removing the other program files. I get error message program already installed. I can see no mention of doom 3 any where I cleaned my registry of all doom 3 entries. deleted ID and activision registry entries as well. I assume this may have somthing to do with protection on the original CD or a some registry entry im not aware of. Im running win xp home. Please please help am desperate to play this game.