[newbie] Setting up VNC

[Graham Trott]

Can anyone explain

a) Why the following messages result when starting up VNC:
   xrdb: No such file or directory
   xrdb: can't open file '/root/.Xresources'
   /root/.vnc/xstartup: xterm: command not found

b) How to start up KDE instead of the default twm.  Using 'startkde' I get a
whole raft of error messages among which is a complaint about KDE already
running.

This is a fresh server installation of Mandrake 7.2; the only thing I've
done so far is set up Samba.

TIA

-- GT