Create a script with the following contents:
if [ -f $HOME/.Xresources ]; then xrdb $HOME/.Xresources; fi
xsetroot -solid grey
xterm -geometry 80x24+10+10 -ls -title "TurboVNC Desktop" &
twm
then pass the filename of the script to vncserver using the -xstartup
argument.
> Capture.JPG