[TonyMontana]

ill try and take a crack at this:

before you start your server, your friend needs to know your IP address. In order to obtain this goto start, run. Type in "cmd" and hit enter.
in the command prompt type "ipconfig /all" without the quotes. Write down your ip address and give this to your friend. Once you start your server tell your friend to connect that ip. If the console is not enabled on your friends game, tell him to goto Advanced options, and click the Console box. then to open the console press the ~ key. Now type "Connect IP" in the console without quotes, where IP is your IP address you gave him.

Hope this can help