-> make sure you have patched fallout with the latest patch 1.5 Link: http://fallout.bethsoft.com/eng/downloads/updates.html
-> Extract using 7zip or winrar
-> place the data folder into your fallout directory. (default C:\Program Files\Bethesda Softworks\Fallout 3)
-> Place a checkmark before BrokenSteel.esm by hitting the Data files tab in your fallout 3 launcher.
-> Play the Game!