If that doesn't work do a search in your regedit.exe file for grim, lucusarts, etc to make sure all the old registry entries were deleted when you uninstalled the game. If there's anything left get rid of them, then try installing again. Before you delete anything back up the registry files in case you delete something you shouldn't have. If you don't know how read this http://www.windowsnetworking.com/art...ry-Backup.html
assuming your running xp. Probably not a bad idea to do the backup before anything else. Hope it works for you.