Please buy Windows 7 now.
http://www.amazon.com/Microsoft-Windows-7-Home-Premium/dp/B002DHGMK0/ref=sr_1_4?ie=UTF8&s=software&qid=1256924283&sr=1-4
http://www.amazon.com/Microsoft-GLC-00182-Windows-7-Ultimate/dp/B002DHGMVY/ref=sr_1_6?ie=UTF8&s=software&qid=1256924283&sr=1-6
No - XP Downgrade is not possible from Tech support...
Great Information. Use the online chat for better response.
Is there a similar policy for XP professional?