As for the Pavelow door look here at these 2 liks and see if this helps!
http://www.novahq.net/forum/showthre...elow+door+open
if not be patient im sending 2 people to help you as we speak on some of the issue that i cant find an answer to!
As for the Z Values i have tried makign hillsided maps with fences and its hard sometimes you have to make it 2 times as high to make it look good i prefer you only use them on flat terrains its alot easier but NAVSPECWARCOM might be able to help you fix it pm him or he will be here soon to help!