Does anyone know what the yast utility for enabling & disabling Remote
Administration actually does ?

I'm looking for what files and services that need to be modified and
restared to enable it through a SSH session.

So far I have this:
Modify the following:

/etc/opt/gnome/gdm/gdm.conf [secuirty] AllowRemoteRoot=true
/etc/xinetd/vnc disable=off on seesion
you wish to connect to.

restart xintd & xdm

This worked once but then failed the next time I tried it. All I get is a
blank VNC screen. At least I know the VNC server is responding.
I thought that maybe I needed to run SuSEconfig but that didn't work either.
Any thoughts ?
Firewall is disabled.