If you go to XFrog's web site http://xfrog.com/130-free-xfrogplants-now-available/ they have some free plants/trees in vob format, not all the freebies listed there have vob format, you willl need to click on each freebie link to see what format is available for that particular item. The Japanese Maple for example is one that has a Vue download for it.

I belong to the XFrog Yahoo group and the following tutorial has recently been posted there for help with thier plants in Vue. www.xfrog.com/Vue/1300XfrogPlantsVue.avi

 

Hope this helps