IIRC it should be possible... don't ask me how exactly, thoughBTW is it still impossible to add new unit types? Or did they make that doable in Arsenal?
On the same matter, what graphics file changes the diplomatic menu's "areas" (the box with the alliance name)? I'm modding the game, and when I change one alliances name, it goes annoyingly over the box borders.
Wow, a Zombie mod.
I wonder how you're going to exploit the game's combat mechanics to adapt it to Zombie warfare.