Attached Link: http://www.kurtz-fernhout.com/PlantStudio/help/index.htm

You can hold the alt key while mouse clicking the tree icon and a library of presets will pop up. Just pick one. That's a really fast way to get trees in your scene without all the tweaking. Of course, you can still tweak them. Also, don't forget plant studio. Its free now. You can export in up to 8 layers and texture each seperately. Good for smaller vegitation.