Well, since it already started here, let's keep it here. I was suggesting TWC only for a second forum to spread maximum word, not for moving the forum from here to there.
I actually don't know how to mod yet. When I do learn I'll be able to help. My most extensive modding experience happened just yesterday, when I successfully modified the range of the Bucellarii in RTW:BI, and added some bucellarii to a campaign's starting army.
One thing I can help doing is historical research on units and faction descriptions, etc.