How i can change MAC-address of ethernet?

in the tiger i just was typing "sudo ifconfig en0 lladdr (or ether) 00:0c:76:18:25:ac" but in leopard that doesn't work.
Programms like MacDaddy X and ChangeMAC doesn't work too.
I dunno what i must do, please help.
how it works in leopard?
Message was edited by: Flamesix

i'm having the same problem (and because of that i claim Apple did really forgot the 'Computers' part when they changed their name, i had to install Leopard just to see i cant change the mac thus connect to my lan, thus i had to install tiger back, grr)
in another thread i've found this alternative to en0 ether xx:xx... :
sudo ifconfig en0 lladdr 00:00:00:00:00:00
but i remember trying it without success, anyone has a clue how to change the MAC address in leopard? on top of it - why on earth would they downgrade a system? is this one of these 300 new features? sweet :P

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Computer-name-iMac:~ username$ ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1492
inet 192.168.0.2 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:1e:c2:aa:bb:06
< cut>
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<cut>
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How i can change MAC-address of ethernet?

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