Use xnest to make VM window wobble with Beryl

I just find a cool way to make my VM window integrates better with Beryl. See the picture below, I could bend or do any Beryl effect on my PowerPoint (running on XP on VMware Server) easily :

Just follow easy step by step from this site.

My screen size is 1024x768, so I modified the rdeskwrapper into :

#!/bin/bash
Xnest -ac -terminate -geometry 1024x748+0+0 :3 &
DISPLAY=:3 rdesktop -a 24 -f $1 &