What I'm trying to create are Colonial Capitals, and in order to do so I need to be able to (a) require that a building be on a foreign continent and (b) limit the building to one per continent. If I only needed (a) this would be pretty easy to do...and could be done via xml only. The problem is I need both (a) and (b). I suspect this will require some lua coding, which I have no familiarity with. Would someone who knows some lua be willing to help me with this?