Problem with WRT54GS wifi router and 660 Series Modem

[Vitalius]

Connection-specific DNS Suffix:
Description: NVIDIA nForce 10/100/1000 Mbps Networking Controller
Physical Address: 00-1F-16-55-BB-D3
DHCP Enabled: Yes
IPv4 IP Address: 192.168.1.6
IPv4 Subnet Mask: 255.255.255.252
Lease Obtained: Saturday, June 06, 2009 5:11:47 PM
Lease Expires: Saturday, June 13, 2009 3:50:47 PM
IPv4 Default Gateway: 192.168.1.5
IPv4 DHCP Server: 192.168.1.5
IPv4 DNS Server: 192.168.2.1
IPv4 WINS Server:
NetBIOS over Tcpip Enabled: Yes
Link-local IPv6 Address: fe80::7d3f:1d04:ff9c:8b14%11
IPv6 Default Gateway:
IPv6 DNS Server:

[Vitalius]

oh also about my fix i tried i wont say exactly what i did (cant remember was like 1 month ago) but I think my problem is with the whole 255.255.255.252 subnet mask -_- I looked up subnet masks and it said something about how only 1 computer could use internet at a time if we used that one... not sure if that helps but i can't change it... so ya.

[Rob Pomeroy]

This 660 series modem - does that have an ethernet port?  I wonder if we're dealing with three networks, not two - the internet, an inner network between the modem and the router, and the local area network...