These homecities I have leveled up gradually or changed via Text Edit to be 120-130. Almost all cards are chosen, but a little place is made for you to level up the remaining cards! None of the homecities replaces any existing homecity, that is, unless you've given your HC a custom name that is the same as one of these. So if you have Amsterdam, don't worry, New Jersey won't replace it! Or with Seville, Corduba won't replace it! The only homecity that replaces is United States, as St. Louis. But I hope you won't mind a 129 Homecity!
For United States cards:
The homecitySPCAct3 file goes into:
Program Files (86x) - Steam - Steam Apps - common - Age of Empires III - bin - data
For Homecities installation:
And the rest from Bangalore to Triple Alliance go into:
My Documents - My Games - Age of Empires III - Savegame