Downgrading newly purchased Windows 7 to Windows Xp Pro

1. Install fresh copy of Windows Xp Professional. ( You can use any activated Windows Xp Professional product key )
2. After the installation activate your installed Windows XP professional through telephone.
3. Gather the 54 digit installation id.
4. Email the obtained 54 digit installation id to Microsoft. ( seapa@microsoft.com )
Note: Your email details should contain this.

* your genuine windows xp pro product key (25 digits) ***** ***** ***** ***** *****
* the windows 7 product key you want to downgrade (25 digits) ***** ***** ***** ***** *****

* the 54 digit obtained installation id (54 digits obtained during the activation through telephone)

5. Wait for the reply of the microsoft containing the 42 digit confirmation id then input it on the step 4 of the activation wizard through telephone.

6. Click the next to complete the downgrade process.