I get a lot of requests from people on how to manipulate their MAC addresses. Most of these are related to connections from wireless clients. Unfortunately, there is still the impression in the general public that MAC address control is a security configuration. The fact is that this isn't true, because of how easy it is to change a MAC address.
Don't believe it? Then check out this article on how to change your MAC address on a Windows XP computer at:
That article provides information on how to use a freeware, command line tool on how to change your MAC address in Windows XP.
Thomas W Shinder, M.D., MCSE
Sr. Consultant / Technical Writer