Continuing Time Machine from a new computer

I'm going to be switching out my laptop soon and want to continue using the same time machine backup as before, rather than starting a new one. I know that TM relates to your computer's MAC address and I know macosxhints.com have a formula for correcting the MAC address on physically connected drives. I'm using an AirDisk, however.

Has anyone been able to switch over like this with an AirDisk? Thanks!

 

You can definately restore from a backup through Leopard's installer and time machine itself, but you have to specially browse to it. You can't keep backing up to it, though as if it was your old computer an nothing has changed.