NPC/City Ruler Mod?

I wanted to start a nice little Voltz server for me and my friends to play on. However, I already know what's going to happen. Someone is going to blow up a base, an all out war goes on for a day, then everyone quits because they get bored. I thought adding a mod to the server that would make them less likely to initiate war. The first thing that came to mind was a city. I looked through a few pages on google, and the closest I found was the Ancient Warfare mod. I want something where the players can control NPCs within their city, effectively ruling over a domain and citizens. I feel this would lead to less horseplay.

Is it possible to install the NPC only aspect of Ancient Warfare? what are you suggestions?