From Newsgroup: alt.games.fallout
Try here:
C:\Users\Your User Name\AppData\Local\Microsoft\XLive\DLC
I drilled right down to the content folder, then copied the 3 files, Anchorage.esm, Anchorage - Main.bsa, and Anchorage - Sounds.bsa into the
data folder in F3.
http://fallout.wikia.com/wiki/Operation:_Anchorage
Scroll down the page for instruction
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