VNC server (aka KDE Desktop Sharing) under Suse 9

Suse 9 has an inbuilt VNC server called KDE Desktop sharing (under the System -> Remote Access menu). It can be configured in the Control Center -> Internet & Network. Unlike when you start up VNC via the command line ("vncserver") this tool doesn't start a new X desktop, but connects to your already existing X desktop. It is possible to run in addition to the inbuilt KDE Desktop Sharing a normal vncserver that starts its own X sessions.