Windows Server 2003 and with 2 NIC, 1 for my nwtwork and 1 for my cable mod

I’m running a windows server 2003 as file server, domain controller, dns and dhcp, my network range of ip is 10.0.0.xx everything works fine, I had a adsl modem and i were able to disable dhcp and enter my own ip settings on it, now I got a cable modem with a static ip 206.126.120.xx, I connected to another nic on my server and I’m getting internet on my server, how do I bridge or link and that the other pcs on my metwork connectto the internet through the other nic