There are three VMWare templates available at http://deterlab.net/~jjh/ for Boss, Users, and Router nodes.
The users image contains two disk images. One is for the main operating system and the other is for NFS exported filesystems. These are kept separate in order to make it easy for sites to deploy a bigger NFS export filesystem.
Nothing special to note yet.
This image is minimally configured to route between the various networks. It is also configured to route/relay Multicast and DHCP requests between boss and the control network.