Yesterday (Thursday), at roughly 9 AM, the hard drive in my laptop crashed hard. To the point that the disk was no longer able to boot the machine! :-(
Fortunately, at 4:15 PM on Wednesday, I had made a back up of my machine using Apple's Time Machine that is found in Mac OS X Leopard.
I had only ever STORED data using Time Machine, I had never RESTORED data with it, so I was a bit anxious as I prepared to create a new copy of my working environment using the Time Machine back-up.
I had to connect a new FireWire disk to my iMac as well as the Time Machine disk and then boot the iMac using the Leopard install disk. Then I invoked the "Restore Time Machine back up to System" command which after 2.5 hours managed to create a new bootable copy of my working environment.
As of 12:52 AM today, I'm back in action!
Ken
P.S. My laptop is at the Apple Store waiting for a new hard drive!