incase anyone doesn't know how to run THS (or any mod) in bi.exe (or even alex.exe)!
step one: go to:
program files\rome total war [gold]\bi\data\ui\roman\interface
and copy "battlepage_03" into the same place in your THS data folder:
(program files\rome total war [gold]\THS\data\ui\roman\interface).
step two: go to THS\data\text and copy the file named:
"imperial_campaign_regions_and_settlement_names.txt" -- rename the copy
"barbarian invasion_regions_and_settlement_names.txt"
step three: go into the THS\data\world\maps\campaign folder and copy the folder named:
"imperial_campaign" -- rename the copy
"barbarian_invasion"
step four:
copy your bi shortcut or make a new one. right click and select properties.
in the box labeled 'target' paste:
"Program Files\rome total war [gold]\RomeTW-BI.exe" -mod:THS with the quotations.
If you have steam, right click on your rtw gold icon and select properties and then set launch options launch in the space, type: -mod:THS
let me know if this works/is right