The best way would be to set up a Lan between the 3 PC's you can use a Switch Like this Netgear Model
and assign each PC a static IP address on the same network
- PC1 would be IP 192.168.1.1 subnet 255.255.255.0
- PC 2 192.168.1.2 subnet 255.255.255.0
- PC 3 IP address 192.168.1.3 subnet 255.255.255.0
Or use one of your routers laying around, Make sure the router is restored to factory defaults. Leave all the PC's off and connect them to the routers switch ports numbered 1-4. Do not use the WAN or Internet Port. Turn on the router (note the router Internet or WAN connection light wont be lit and its not needed for this setup). Turn on the PC's and make sure they all have an IP address. Start the game on each pc and from the main menu select Network. This will take you to a gaming lobby where you should see the other PC's. If you cant see the other PC's try disabling windows Firewall (temporarily you should re enable it when connecting to the internet). I apologize in advance I do not know much about the game or configuring it to Connect on a LAN I have not found a definitive set up guide yet.
Edited by Sneakycyber, 30 September 2012 - 10:59 AM.