Do you have a Mac in you lab that won't boot up?  Here's how to re-image so the machine will function normally.

Re-imaging a Mac Computer with Firewire

Re-imaging a Mac Computer with Firewire

1.   Restart the troubled machine and hold down the T key until the Firewire symbol appears on the desktop.
2.   Log in to the Master machine as sd22user.
3.   Attach the Firewire from the Master machine to the machine to be cloned.
4.   The Macintosh HD will Mount on the master machine desktop.
5.   On the Master machine go to Applications > Utilities and open Super Duper.
6.   Select the Master machine as the "Copy" machine and the trouble machine as the "To" machine.
7.   Press Copy Now and follow the Prompts.
8.   Once finished, Quit Super Duper, and drag the Orange Macintosh HD to the Trash.
9.   Hold the Power Button in on the cloned machine, the machine will turn off.
10. Restart the Cloned machine, Go to System preferences and change the last digits of the name of the  
      machine in Sharing and the last digits in the IP address in Network.

Follow this url for Super Duper

http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html