[Wlug] X tricks

Hi All, I was wondering if there is a way to create a window that would be a tunnel into another X server. For example if i'm running a server on :0 and on :1, i would like to have a window, which is connected to :0, that would show what is being displayed on :1. This is similar to how vmware works. When you start vmware in window on :0 it will actually start another X server on :1 and display (in a window) the contents on :1. Is this possible (other then with vmware)? Thanks, --brad