[Pocus]

I discovered by chance a while ago that, if you script special home sites in provinces which are not the capitol, then you can recruit these specials units.

So in essence, if you make a scenario, you can eiter add these sites in non capital provinces, or suppress the capital flag of a province, thus opening the site to everybody. not a good idea though, because capital has special capabilities, like the returning point of your god for example.

So the best solution is to let players have a capital province, but make a killfeatures on it, and add manually the sites in a nearby province.