It's been done, but at least you figured it out.
Try something harder now. I suggest you take a look at woodens map called "good cliff work". It can be found here:
http://www.staredit.net/index.php?showtopi...ndpost&p=403869(Go to the bottom of this post and download the map called "cliff Terrain".)
It has alot of cool trick like highdirt-cliff faces and other cool things.