Just manually assign each comp a IP adress and Subnet Mask within the routers range.
as an example (your router range may be different)
1st comp IP 192.168.1.111 SM 255.255.255.0
2nd comp IP 192.168.1.112 SM 255.255.255.0
Then specify the routers address as the Gateway
You may also need to specify DNS numbers and Domain name for your specific service provider.
I aint signing nothing!!!