I got a Mac mini for my parents for Xmas and this weekend I tried do them a favor by copying everything over from their old B&W G3 tower to the new Mac mini... but you can't boot the older B&W into Firewire Target Mode
So I was wondering: Can you just tell Mirgration Assistant to use a secondary drive?
For example I've got backup of the old G3's users folder on an external Firewire HD. Will Mirgration Assistant access this drive or does it only look for a complete computer to upgrade from?

I thought Mirgration Assistant would only pull info off a boot drive with OSX installed on it... anyone know for sure?