A CRP can have the most beautiful build anyone has ever seen and still be a pile of garbage because of that gamemode. Iban said it himself that the CityRPG mod is incomplete, bad and should not be edited/hosted.
Actually I disagree on this completely, and it's totally untrue.
Creating a clean, pretty, and easy to understand city with balanced mod edits makes the game totally playable and fun.
The code may be old/garbage, but the gameplay is the key part.