this is another one, but using Openbox. It will reduce the idle RAM usage to aprox. 22mb.
apt-get update apt-get install openbox vnc4server iceweasel menu obconf obmenu mkdir /etc/vnc echo 'openbox-session' > /etc/vnc/xstartup reboot vncserver
the last step will ask for a pwd, use it for VNC. Optional, create a user, log in with it, and then run vncserver, so the session is not rooted.