I see. Would you be interested in working on a team I've recently built? Kine100, Mattem, and I are all working together to create new "what if" units. The main idea being, "What if each culture group discovered technology on their own, without much outside influence? What would their units, architecture, and equipment look like? I do the modeling, Kine100 has done the texturing, and Mattem has done the rigging and animation. We already have one unit ready to go, with a second waiting on rigging, and a third to be textured and rigged.
Here are some previews. The Japanese Ironclad is finished by the way, it works in game and everything.

It's so cool to finally reach the Industrial age, and say, "I get to keep the original cultural stylings of the ships, even in the Industrial Era."

The Mesoamerican Bombard is based on the Aztec Mortar from Civ III. It was such a cool design, I needed it to be in Civ IV. It just needs rigging, then it will be ready to go.
This offer / request goes out to anyone interested by the way. The more we have on our team, the faster we can crank out new units to fill in the gaps.