From Lizard Systems:
Change MAC Address is a simple tool for changing the MAC address of a network adapter. You can spoof the MAC address, set the MAC address of another manufacturer or generate a random MAC address in just several mouse clicks. Your changes will be applied at once and they will be retained after you restart the system.
In WIN 7 you can only change to MAC addresses that begin with 02.xx.xx.xx.xx.xx. True spoofing to a specific MAC address is impossible for all practical purposes. WHY is this very important point not mentioned anywhere on the this info page?
Until they fix this issue I say all updates to this prog are pointless.