I know this issue has been posted many times, but I can't get mine to work properly. I have the Game of the Year Edition of FO3 and have installed the second disk (DLC). If I open the program files for FO3, the DLC files are all in there. When I get into the game, supposedly you are meant to go back into the wasteland a wander around a bit before the expansion kicks in and notifies you. I wandered around the wastelands (everywhere, near Arefu mainly) and the expansion never kicked in, the game still ends after I purify the water and watch all the credits. Anyone have any advice?