hey gun guy. It's actually simple. Go to start, run, type in cmd. Command prompt will open. Type Ipconfig. get the IP address for that computer. Run FPSC game on the computer you will use as your lan server (Can also be played on, at work we call it papa) Host a game. Now your other players can sit down, when it says on their screen to enter an ip address. Simply type the IP of the papa computer into the box. And there you go, they will connect to your comp. Make sure all your computers are hooked up to a server, or Ethernet cord system.
**EDIT**
When you build the game find the setup file open it and where is says multiplayersomethingorother = 0 (I forgot the name) make it 1 and if its 1 make it 0 save and try.
"I haz no sig :o"