I got Fallout 3 + some expansions from my friend. I've finished Fallout 3 and had no problems whatsoever, but, when I install epxansions, Broken Steel, The Pitt, Mothership Zeta i just see red exclamation marks and npc's are bugged. Like that tunnel that I am supposed to enter, I just see railroad and big red diamond with exclamation mark. In Broken Steel i miss a complete building, there are bugged npc's in the air and again, red exclamation marks. Is there any fix for this, prefferably automatic, but if not possible, manual is ok.