If you have ever been to a LAN party you will know that you connect your computer to a Ethernet router or hub. This program (Hamachi) will allow you to do the same over the internet with your friends. If your computer is connected to the internet, then you can use this.

notes:
-Make sure your file sharing is turned on
-Be on the same work group ex. MSHOME
-Complication may occur if you are connected to the internet by wireless
-When you set up games you want to make them on Network not Online Multiplayer


https://secure.logmein.com/products/hamachi/list.asp