This is a request =) since i dont know how to mod. Is it possible to make a Tower Defense mod or maps? People who played Warcraft 3 Frozen Throne know what im talking about. A map where you have to defend something from attacking units and you get gold for killing them, which you can use to upgrade and or buy new towers.
Just a thought =)
I'm not sure you can get gold in Supreme Commander :) But there is a map out that might be what you are looking for, it's called Castle defence or something like that on the filefront SupCom site :)