Add graphic: Tall wall graphic replaces the cliff image.
Add unit: A towers-gates, and a chevaux-de-frise.
Lay the city wall:
As the method of the original cliff.
Lay the towers-gates:
It must put in a particular place be getting footholds in cracks in the cliff,
Lay the city gate:(see chart)
Usefulness/Novelty: 3.5
Useful - indeed. But not if you're planning on ever having cliffs. Also, the mod is not sterile - it comes with a million of junk units in the editor. Also too bad cliffs can only be pointed to two directions.
Quality/Instructions: 4.5
No instructions in file, but not hard to get the idea. Quality is perfect!