[idi banashapan]

check these links out....

http://aumha.org/win5/a/wpa.php
http://www.webtree.ca/newlife/WindowsXP_WPA_details.htm
http://www.windows-help.net/WindowsXP/activation.html

General consensus of opinion on these articles seems to state that you can active windows over the internet every 120 days with substantial changes to the hardware. Check out the third link under the paragraph titled 'Hardware Changes". This link may be the most useful in your case.

Hope this helps.