vncserver with Aqua gui

Greetings - I am setting up a mac with multiple remote users. The users would like to have access to the standard Mac OS desktop via vnc. From what I have found so far on the internet, this might be possible as long as multiple user switching is enabled (which it is). I installed tightvnc and got vncserver running but is is showing me an X desktop instead. does anyone know how to get the Aqua desktop displayed? thanks Mike