Hamachi is a zero-configuration virtual private network (VPN) shareware application capable of establishing direct links between computers that are behind NAT firewalls without requiring reconfiguration.
Basically, it lets you play games with other people without all the hassle of going online.
To join an existing Hamachi network, find the bottom-right corner of the Hamachi window. Click on the button that resembles a triangle, and then click "Join an existing network". Simply enter the network name and the network password, and you should be all set.
To create a new Hamachi network, click on the same triangle-like button. This time, click on "Create a new network". Enter the desired network name and the password associated with it.
This is a list of several Hamachi networks that were created with the purpose of playing BFME2/ROTWK.
Post here and I'll add more.
But that does not mean that I walked alone. ~ Brandon Sanderson
[This message has been edited by Blatant7 (edited 01-23-2010 @ 09:42 PM).]