RTF is a global modification that replaces all towns in the game.

Should decorations be added as new ones or by replacing the old ones?

As new ones (they can replace portraits).

Didn't make walls.

Okay.

I have no ideas on how to make the inside of the city.

Yes, I got stuck. Contact [email protected]

Added 7 minutes later
Composition of the Human faction (may change, or who knows xD)
1. Pikemen
2. Archers
3. Crusaders (swordsmen)
4. Vestals
5. Solar Flares
6. Unicorns
7. Light Dragons