Ok guys, this is a way to play against/with each other without going online.
First, download Hamachi. Search for it on Google and you can download it for free. It's a network-connecting program.
Next, on the bottom-right of Hamachi, there should be a join/create network button. Push it.
The network name will be BFME2H. The password will be dagorlad. Once you're in, you will see other members of the network, and whether they are online or not. If two or more people are online, they can go to the BFME2 main menu, press multiplayer, then press network to play.
If you need help with anything here, don't hesitate to ask. I look forward to seeing you all on the network!
Yes, I began my journey alone, and I ended it alone.
But that does not mean that I walked alone. ~ Brandon Sanderson