Hi Waz
You are correct in assuming that you will need a second NIC (with a private IP address statically entered) that will connect the WinGate server to the rest of the LAN.
The LAN client machines can be given an IP address by WinGates DHCP (as it comes with its own DHCP server), or statically assigned a private IP that is in the same range as the WinGate PC.
Then if you set the client DNS and Gateway entries (in their network properties) to the Internal IP of the WinGate machine, all of their Internet requests will be forwarded to WinGate who will inturn use the Public IP on the cable modem NIC to fufill their Internet requests.
This is the NAT (Network address translation) method of connection available in WinGate and is generally the easiest to configure.
For more of an overview on how WinGate uses Private and Public IPs you can read about it at our knowledgebase here:
http://support.qbik.com/index.php?_a=kn ... ubcat&_i=1
Hope this helps
Erwin