The big blue "Renegade Master Server" window looked okay to me. This is what you run as the FDS, then you connect the players (i.e. the actual game clients) to it. You can use a desktop shortcut or the run command to put in the proper params, but I recommend using the Asterisk tool. You'll want to input your game's path as a game/mod profile, then use your computer's LAN IP and the server port to connect. If your port's open on the router, people on the internet can connect to it by using your WAN IP and the listed port. If you put +multi in the "additional commands" line, you can connect multiple players to your server from the same computer. Nifty!