Spoof Mac Address on Windows7
Network and Sharing Center > Change adapter settings > right click on adapter name, then Properties > Configure > Advanced tab > Network Address
By default, “Not present” value it’s on. Just click on the blank field and write the MAC address you want (without the lines, eg. 00FB0R…).
Hope this helped.
source: http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/697bf48c-a226-4315-8875-2bbeddf16db2/
