this work fine too...

(from LestaT)
Step One
1. Open
Rome - Total War folder
2. Open
EB folder
3. Open
world/map/campaign folder
4. Rename
imperial_campaign into
barbarian_invasion
5. Open descr_strat.txt inside the
barbarian_invasion folder
6. Find
campaign imperial_campaign and change it to
campaign barbarian_invasion
7. Save the file and exit the folder/s
Step Two
1. Open
text folder
2. Copy and rename
imperial_campaign_regions_and_settlement_names.txt into
barbarian_invasion_regions_and_settlement_names.txt
3. Save file
4. Open
campaign_descriptions.txt
5. In the notepad (or any text editor) click;
a- edit
b- replace..
c- in Find what: box type
IMPERIAL_CAMPAIGN_
d- in Replace with: box type
BARBARIAN_INVASION_
6. Save and exit
Step Three
1. On the desktop, right-click on the
EB shortcut
2. Left-click
properties
3. In the target line, replace
RomeTW.exe with
RomeTW-BI.exe
* do not replace the whole-line, just the stated words above only.
4. Click
apply and exit the box
5. Run the game....
Note: Just to add, this assume that prior to installing EB, you already have
RTW and BI installed and patched to v1.6