I was setting up Microsoft NLB in a couple of Windows Server 2008 Hyper-V images... and since infrastructure in general is one of my weaker sides, I was looking for help.

 I came across a couple of articles which helped me:

* A Guide which is very easy to follow: http://www.jppinto.com/index.php/2009/05/install-and-configure-wlbs-nlb-on-windows-server-2008/

* Support article on how to configure MAC address: http://support.microsoft.com/default.aspx/kb/953828