Then do it yourself :

Besides copying of eb\data\world\maps\campaign\imperial_campaign to eb\data\world\maps\campaign\barbarian_invasion you need to copy eb\data\text\imperial_campaign_regions_and_settlem ent_names.txt to eb\data\text\barbarian_invasion_regions_and_settle ment_names.txt

That's the essential bit.

Takes 2 minutes.

Then change RTW to RTW-BI in your short cut and your done.

I did it, so I know it works.