It's reasonably easy to make EB work with 1.6 already - you can do it yourself in no time. If you have a copy of BI on your computer (ie a fresh install) just copy the RomeTW-BI.exe file to your EB installation directory and change the EB shortcut to point to this file rather than RomeTW.exe. A few people have done this and seem happy with the results, even without adding the new unit formations - the AI seems a *bit* brighter, and things are actually slightly tougher on the campaign map with more naval invasions than before.

Give it a try, the results may be good