Originally Posted by
Lestat
Unpack the mod to xxxx/steam/steamapps/common/rome total war gold (where your Steam installation is).
Ignore the launcher and short-cut prompts, they won't work
Open Steam, right-click on Rome: Total War Gold in the My Games menu
Select Properties
Under the General tab select Set launch options ...
Type in -show_err -nm -mod:bi/eod2 without quotations and click OK
Launch Rome: Total War Gold by double-clicking it in the My Games menu
Select Barbarian Invasion from the two-choice list and Launch.