Well after trying to find a fix for 4 or 5 days, I THINK I found one, almost 5 minutes and making the above post. My google FU had been failing me. First - Lauch Fallout3 through steam, on the laucher window click the Data option, select all the mods you want. Exit. Then add - "bEnableFileSelection=1" under the [Launcher] heading in C:\Users\Username\Documents\My Games\Fallout3\falloutprefs.ini This seemed to do the trick. It looks like it's been a known fix for Skyrim. Hope that can help someone else.