Make FORTS of the city... (Chariots of War)

How to make FORTS... city in the game Chariots of war.
The game is almost half of the settlements are the FORTS, where there may be enhanced performance of the Fort and where you can build just ONE! a business or farm. The second (third etc.) the company to build there anymore, also the barracks can not be built, the people toils without a cause. The income from such settlements scanty. How to be?
Having read about what players "Rome: Total War" to create a modification, I got into the files of the game and found that it is possible to make the FORTS a full-fledged city.