Put the 4gb exe in your data folder where your fose exe is and use game companion - Fake Fullscreen Alt Tab Fix :[url]http://www.nexusmods.com/newvegas/mods/42956/?[url] so far game companion runs good for me in FO3 I am still testing it follow instructions in video [url]https://www.youtube.com/watch?v=tbjxgCPreIw[url] FO3 and FNV set up the same way, let me now if it work.