Help! First week on the job and get thrown a huge job and need some advice! Company has 1000 desktops/laptops. 500 are Windows XP, 300 are Vista, and 200 are Windows 2000 and boss wants them all upgraded to Windows 7. What's the easiest, cheapest and fastest way to get this done? How many cals am I going to have to purchase for this. We are also upgrading to Offce 2007 from 2003. How many cals do I need for Office? Thanks!