Ok, here is a simple guide for adding new buildings. 1. Make sure that that the model (.nif files) and texture (.dds or .tga files) are in the same folder 2. put that folder in assets/art/structures/buildings/ Now it's time for some xml work *THE BEST WAY OF CREATING XML ENTRIES IS COPY 'N' PASTE* 3. Open the file assets/xml/art/civ4artdefinesbuildings.xml and create an entry for your new building. The fscale determins the size of the building in game and the finterfacesclae the size in the pedia. 4. Open the folder assets/xml/buildings. Here are 3 files that must be changed: 5. If your new building is NOT a unique building, it needs a buildingsclass. Create an entry for that in the file civ4buildingclassinfos.xml. 6. Create an entry for it in the civ4buildinginfos.xml. 7. The file Civ4CityLSystem is a very important and very difficult file. This file controlls if a building uses different models through the ages or not and on what sort of "leaf" it is placed in a city. I sugguest to copy and paste the entry of a building with a similar ground.