The sticky about LAN setup has all the info you should need to set up your network , if you are running windows.
Just follow the instructions he has there and you'll have a running LAN that will play the Emu.
I think all you need to do is set the ip address for both pc's under the LAN card tcp/ip settings.
The sticky has all the info you'll need to make it work.
Good luck
One other thing, I have to log off the internet before I can run my server locally and have people be able to log onto it.
If I'm online then my server tries to use it's online ip address instead of it's local address.
Hope that helps a bit