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Whoah. Sounds like you've got your network all confused. Most cable/DSL providers give you 1-2 IP addresses straight through the modem. If you've got a router, I HIGHLY recommend that you use it to firewall off your other computers. Here's how you should wire it up:
[DSL]--[DSL modem]--[WAN port on router | LAN port(s) on router]--[your computers/hub/switches]
Not a very good graphic, but hopefully you get the idea. The router, by definition, is designed to "bridge" two networks. In this case, you want to bridge your home network to the DSL network, so you plug your DSL into the WAN port, and your home network into the LAN port(s). By doing that, all the computers on your LAN should get IP addresses from the DHCP server in the router (192.168.x.x), and the router will use NAT to let your systems online. As an added bonus for this configuration, this "hides" your LAN from the rest of the internet, effectively firewalling yourself without the need for funky security software. Also, any traffic coming from your LAN to the Internet appears to come from one computer (from the ISP's standpoint), so if your DSL contract has some kind of "per-system" pricing, you can cut it down to one "system" and run as many computers as you like. The ISP will be none the wiser.
Hope this helps.
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