RedHat 6.1 is not much different from redhat 6.0 + updates. Here is a run down.
Check out the documentation above on the update font server for rh6.0. To make it short, you edit /etc/rc.d/init.d/xfs and change the -1 to 7100.
# See how we were called.
case "$1" in
start)
echo -n "Starting X Font Server: "
rm -fr /tmp/.font-unix
daemon --check xfs su xfs -c \"xfs -port 7100\" -s /bin/sh
Then you edit the server /etc/X11/XF86Config and change the -1 to 7100 in the fontpath line
FontPath "unix/:7100"
Restart the font server and the X server. Reboot is a safe choice here.
Edit the file /etc/X11/xdm/Xaccess and un comment the line
* #any host can get a login window
Restart xdm or kdm
killall kdm
Note that this will kill and restart the X session. You may want to close important application before doing so :-).
Edit the file /etc/X11/gdm/gdm.conf and change the line
[xdmcp]
Enable=1
edit the file /etc/sysconfig/desktop and enter the word KDE or GNOME gnome. To enable the change, kill the display manager like this
killall kdm gdm xdm
Close important applicaion first :-)