there is no way to change the MAC address of your particular networking device. as these are burnt onto the PCB's when made. each networking device has a unique MAC address, as 2 identical MAC address's on the same network would cause the network to crash. There is a way to fool the MAC address and 'change' it but this is done by software.
also there is no security threat with MAC address's, as if, in the highly unikely situation that someone guessed your MAC address, then they wouldn't be able to do anything unless they knew your IP address as well. however, they could do an RARP request to discover this but it would require the actual networking device to be set up to ask this.
soin short there is no way to change the MAC address as they have no use on networking addressing whatsoever, unless of course you still use IPX protocals from novell. then it is only part of the address not the whole address
