J. K. Cliburn wrote:
If you want to actually get an X desktop on your client from the FC5 machine, you need to enable XDMCP on the FC5 box. Login to it and run gdmsetup to enable remote login. You'll have to unblock port 177 on it, and you'll have to unblock port 6000 on your client.
Is there any reason you can't ssh to the host and run either "gnome-session" or "startkde"? As far as I know, there isn't, so it's trivial to run an X desktop via ssh rather than XDMCP.