Theres castles, old buildings and huts and dirt roads in the wb. Theres even an old temple model. Plus most battles would probably take place in huge wide open fields for charging, etc. They fought wars differently back then :P Any extra work that needs to be done will be done.
*edit*
Ok, thanx to Mastermind we now have hosting. The website isn't up yet. Hes not THAT fast :P, but he is rather fast so the forums are up. You can view it here. Sign up there if you want to see the latest on the mod.