How to build Master server for free?

Hi! I'm trying to build a master server. I have followed this tutorial http://www.youtube.com/watch?v=1KIoGOYOUvk

I have also read the doc on unity which states that it's a Visual Studio 2008 solution. http://docs.unity3d.com/Documentation/Components/net-MasterServerBuild.html

I did try downloading the 2012 express and when i did try to open it. Visual Studio informed me it was "incompatible".

Can any one explain what I should do?