J_RaD - 11:31 pm on Aug 5, 2011 (gmt 0)
with a little reading ipcop shouldn't be to hard to figure out.... but a normal NAT router should be fine for just 10 nodes on a low profile network.
ditch VNC and try using a remote program called team viewer, you can set it up in dedicated mode and a 3rd party team viewer server does all the handshaking and sets up a secure connection. that way you don't have to leave ports open on your router, a quick port scan will reveal an opening that someone could try to exploit.
what routers are you familiar with? Does the network already have a switch? if so what kind....etc.