@valerostudio said:

If you go the Chaos forums under Beta, you will see an entire series of tutorials I put together regarding proxies and grass scattering.

You can also see this tutorial here.

http://help.chaosgroup.com/vray/help/sketchup/150PB/tutorials_2d_proxies.htm

Thanks Valerostudio for the tutorial! That's very useful.

So we can just create proxy by using Export and then copy&paste. What about the Import button then?