Re: Fallout 3: Operation Anchorage is out now!
GFW puts it in a folder called "xlive" in your appdata folder. You need the two .bsa files and the .esm file from there, copy and paste to your data folder for FO3. Then check the anchorage.esm file when you load FO3, which it sounds like you already did.
Once in the game, if it appears under downloads, you're all set. The way to start the quest is to roam around outside for a while and then pick up a new radio broadcast. It will pop up like the old Oblivion add-ons did, only this time it makes much more sense.
If it is never popping up, I'm not sure what to tell you.
I gots one of them high powered gaming computers with an EVGA GTX 480 video thingy and a Q9550 processing device and also one of them Windows 7 64 operating programs with 4GB of some Corsair 1033 DDR2 ram.
Steam, Xbox Live and PSN: StingingVelvet