ok i can help u. all u need to do is go into windows registry and delet falcon 4.0. thats why u can't reinstall it. all u do is go into run, type regedit, then a window should pop up, then u click HKEY_CURRENT_USER to open its contents, u should see a folder named Software, open that, all ur installed games and apps are listed, ONLY I MEAN ONLY DELETE FALCON 4.0 AF!!!!! IF U DELET ANY OTHER REG ENTRIES THE PROGRAM MIGHT NOT FUNCTION!!!! then delete the folder u installed the game in and ur done. now u should be able to install falcon 4.0 AF. any questions e-mail me at blaze_1283@yahoo.com