I've used this mod a bunch of times before with MGE 3.8.0 without any problems. Now it seems as if the RV version and the vailla version are both there. It seems I can walk around RV, and walk right through the pyramid structures. I've never seen anything like this before:
http://i52.tinypic.com/34qmm8n.jpg
http://i55.tinypic.com/33fgwon.jpg
Could it be a Distant Land generatiing problem?