I'm actually looking for a way to do something that should be simplier, run my KDE XWindows display that normally runs on my Redhat system from my Solaris system. I haven't quite gotten it down yet BUT I did run across somebody describing how to do what you are trying to do.
I found it at
He says in his notes:
"...how to run apps located on another server, whether it be Solaris or some other UNix variant and then how to port them over to your own XWindows session."
Sounds like what you are after.
To give a brief summary of what he tells you to do:
1. export DISPLAY=machineYouAreInFrontOfIP:0.0 on puter app is to run from
2. xhost + from the console on the machine you are in front of
3. from your telnetted/ssh'd session into the remote machine run the app you're after and you should see it pop up in your current window.
Thought this might be helpful info.