Change SID on Windows 7 and Windows Server 2008 R2 using sysprep

http://www.brajkovic.info/windows-server-2008/windows-server-2008-r2/how-to-change-sid-on-windows-7-and-windows-server-2008-r2-using-sysprep/

http://www.plexuk.co.uk/?page_id=793