I noticed a possible scenario for the mod was the American Civil war... Did you actually create a "Confederate States of America" and the "Union" or what?
I already have an American Civil War mod started (somewhere in creation & customization page), which was abruptly halted once they made several patches and kept ruining the work I had done.... that and i got much busier.... Now that (I think) they're done patching BtS, I'm giving it another go, although it still has a long way till a complete scenario will be available.
It includes all the relative civilizations of the scenario, a completely overhauled tech tree (its actually larger than the original), and many, many other features, but now it must be tediously converted to BtS....
if you want some skins, quotes, or whatever else just contact me.