OK, got winwar and 7zip to download and open fine. Got the nexus mod manager and FOSE downloaded. Transferred FOSE mod files OK and Fallout3 opened fine. But , when I opened up my fallout3 it did not save my game ( no continue option highlighted) - I would have had to start a new game- does that sound right? Anyway - I deleted the mod files again and reopened FO3 and then had the option to "continue" again. I am 3/4 done with the game = so no biggie I am enjoying it "as is". I will try to mod Oblivion as I have not yet even started that game. My son thinks it may also be a Windows live thing- my fallout3 auto connects to "live" as it opens. I will make sure when I start to play Oblivion I am not connected to "live" .