I have an idea on hw you could make one, (not sure if this will help at all, but it might be something). First you would have to make a kind of cliff segment, just the model of it with no scripting, then you could use the 'wall' script for it. You could then put it going on the are that you wanted and thenas far down the layers as you wanted and then just put some ground or something at the bottom and then a hurt zone saying like 1000 damage to ensure death if they fell off. Just my idea.
Hope this helps
RichMan
'Making safer worlds through superior firepower' - UAC