Thanks for the comments. The trees are all vanilla XFrog from bundle 1. I have the obj files on a bunch of DVD's which I need to import onto the HD.
The plants do not have displacement maps which is a bummer. So, when I figure out the new UV mapping Blender uses, I'll fix that. The color image maps will have to be tweaked also for bump/displacement mapping.
I also want to subdivide the trunks so they render 'rounder'. Still, Xfrog had a great sale for Christmas and I am happy with the selection of plants I now have,