Set one computer to DHCP, let it connect to the internet. Once it is working open a Command Prompt and type ipconfig /all. Write down the IP, Subnet Mask, Default Gateway, and DNS Servers.
Then you can setup all your computers with static addresses (not in the DHCP range) using the Subnet Mask, Default Gateway, and DNS Servers that you wrote down. You should then have internet on all computers. -WS