Is that save game compatible? When you mod, when is it that you need to make copies in the sp backup folder? Like map.rwn or the others?

Also, if we did what was suggested above, wont that change all the "interface" of Roman pics to Greek pics? What if I only wanted to change the area that shows what buildings/armies are in a spot and the area with the end of turn button, the map area too, if that is different? I don't want to change anything else.