So after much consternation with trees (on a regional scale), I finally sat down and tried to do something about it. I hope this lil tutlet will give you some ideas, at least, of how to accomplish the tree-making part of mapping. Adapt and change them as you wish since I probably will to, this is just my starting point.
Cheers
Edit June 25, 2008: I tweaked the whole process so I rewrote the tutorial and included a pattern used in therein.

