Check out your licensing agreements closely
This writer points out that you can use Microsoft Products on both laptop and desktop.
http://www.mytechguide.org/2010/08/02/microsoft-legally-allows-installation-use-of-microsoft-office-on-two-computers/
My advice is to go get a technet subscription - its cheaper
http://technet.microsoft.com/en-us/subscriptions/bb892756.aspx
or compare MSDN with Technet
http://msdn.microsoft.com/en-us/subscriptions/dd362338.aspx
