Assuming the peer to peer network is just two computers, you don't need a router. You just need a crossover cable. This how to may help,
peer to peer workgroup setupCable or crossover cable - if you have only computers and save some money, you can have a crossover cable to connect those machines directly. Configuration ... http://www.chicagotech.net/workgroupsetup.htm
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Has anyone gotten this technology to work?