Thanks, I didn't really understand the NIC IP stuff but I found this http://linuxsat-support.com/routers/20981-how-unlock...
and followed it and everything else worked so I am now unlocked! The stats & graphing thread looks pretty complicated, I'll take another look when I have more time.
I have a question about cabling, the notes say: "Different cable configurations can be selected through the web interface."
Does this mean I could get internet access via LAN2 at the same time as LAN1? Eg LAN1 goes to the router for general internet distribution, LAN2 simultaneously goes direct to the laptop so I can see the modem admin page when necessary and get internet access via this connection?