Quick Help.....1

I stuck up while launching my new vnc session because I got fade up of gnome so tried remembering how to switch the desktop....There was one way, I knew to go through START->More Preferences->Desktop Switching Tool. I tried it and it didn't work....that happens usually...you go to do something and you see some resistance :-)

A bit of googl[ing] helped again....

Run the utility switchdesk.....So in my case, I did this -

$$ switchdesk-helper 
Please specify one of either KDE, GNOME, XFCE, FVWM or WindowMaker.
$$ switchdesk-helper KDE
Desktop now set up to run KDE.

Fantastic....Launched again the vncserver and I logged in into KDE Desktop. Hope it helps !