I have moved this thread to where it may get more attention and a better response

"Mac security discussions" is for the Apple/MacIntosh platform, which this clearly is not

EDIT:

Try this: http://www.nthelp.com/NT6/change_mac_w2k.htm

Or this: http://tmac.technitium.com/software/...nger_v3.1.html

BE SURE YOU KNOW EXACTLY WHAT IT IS YOU ARE DOING

Software licences and internet services can be bound to a specific MAC address, so if you change it, things might suddenly stop working.

As SirDice implies, it is not the sort of thing you would normally want to mess with. If you do, be sure to know what you have changed and make backups first!