I already have that.
For example i scrapped the coalition idea and decided that i would try to have the game send robots after me.
I commented out the base skirmish activity's. Copyed the skirmish activity's and renamed them robots. Went in to the index and added the line
IncludeFile = Missions.rte/Robots.ini
And then my robots copy looks like this.
AddActivity = GABaseDefense
	PresetName = Skirmish Defense
	SceneName = Grasslands
	TeamCount = 2
	PlayerCount = 1
	TeamOfPlayer1 = 0
	TeamOfPlayer2 = 1
	FundsOfTeam1 = 5000
	FundsOfTeam2 = 5000
	CPUTeam = 1
	Difficulty = 3
	SpawnIntervalEasiest = 20000
	SpawnIntervalHardest = 8000	
        AddAttackerSpawn = ACDropShip
                CopyOf = Drop Ship MK1
                AddInventory = AHuman
                        CopyOf = Robot 1
                        AddInventory = Sniper Rifle 
When i go to skirmish it crash's..no idea whats wrong. 
