[VedalkenBear]

Well, your initial post was quite... ambiguous as to your position. That is why so many people have responded as they did.

And, well, don't call for a mod (especially one that can be tested for general feasibiliy so easily) without expecting the response of 'do it yourself'.

Here, why don't you do this? Get the map that has no poptypes on the independents, and see if the AI can do what you want. If it can, great, you have your own answer. If it can't, then you need to do some basic modding to remove some 'bad units' from a nation or two, assign the AI to the modified nations, and then see if _that_ does what you want. If it doesn't, then it might not be doable. Or you may need to refine what you think 'bad' is.