I have an island with three cities on it. I pressed F1 and turned them into a colony. This is standard BtS behaviour so I expect the code is in the dll. It does not work properly as the free units they were getting were the lowest available rather than the best available. They have no metals connected to their cities yet but as I said I would have expected better than stone throwers given their technology level - the same as me. iirc the best units they could build at that tech level are archers and they should not get gatherers either being well past sedentary lifestyle.
I've found the code. Can you give me a save game from just before you press F1 and get the suspect result please.