Building mission planner(MASTER) fails under Windows XP/VS10

Hi All,
The instructions found here FAILS due to the ArdupilotMega.sln being saved under VS2012 with NET 4.5 , NET 4.5 is NOT installable under windows XP Pro service pack 3.

    besides upgrading to a newer windows(VM only) YECHH... any way I can get one of the devs to save a  ArdupilotMega.sln  version to the git archive compatible with VS2010 XP?

     Hotel Zulu Lima - who does actually try and compile ALL of this code...(its what I do I am a buildmeister)

Mp requires .net 4.0 and VS 2012 +. download VS 2013 for desktop.