Greek Walls

Hi,

Sorry if this has been explained before, but i've been looking and looking, and couldn't find an answer. Basically I don't like the white greek walls on the campaign map, and would like to change their layout. I think I found the files in the 'residences' folder, I just need to know how i can change them?

cheers,
GV

These will all be cas files. You need 3ds max and vercingetorix's cas importer/exporter.