[rudedog]

What you want to do is start your MOH just like you were going to play a MP game

From the MP menu ( threw the brown door on the right side of screen)

click on "start game"
Now pick the type of game you wish to play
Now make sure "dedicated server" is not checked
and "use gamespy" is checked

If your behind a router then you have another set of problems, You will either need to open a number of ports or setup the server in the DMZ
It's easier to just email or give your friends your IP address, unless you want others who you do not know to join your server

Good Luck