XFrog 3.02 (not the free demo) is not an easy program to master and you need a 3D application with an import/export plugin for .xfr one of my friend have Cinema 4D so I use this program to export the plant as a .obj (I don't have Cinema 4D or any other high end 3D program because it's too expensive), for making tree with XFrog here a little tutorial , 1) Drag a simple object on the Root (Camera). 2) Drag a tree on the simple object you just made and name it "Tree" in the Parameter editor". 3) to make branch drag another tree on the tree you just made if you want more branchs drag another tree on the last tree you have made. 4) to adjust the branches and the trunk you have to select each of them and play with the zillion of parameters I cannot explain this here because it's too long but the more important parameters are the number of points in "Primitive" in the Parameter editor also the distribution parameter is very important. Hope it's may help you.
