Running KDE on VNC

[Mark Brummett]

I have an issue where, when I have both Gnome and KDE installed as my
windows, I would like to select one on or the other.  I've gone through
several different websites telling me to change some settings in the
startup script, with no luck.  It always launches Gnome.  Here is the
configuration logging in with Gnome.

#!/bin/sh
# Uncomment the following two lines for normal desktop:
unset SESSION_MANAGER
exec /etc/X11/xinit/xinitrc

[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
vncconfig -iconic &
xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
twm &

I've changed the last line to startkde, but no luck.  I've done several
other things.  

Thanks for any help in advance.

MB