I have it set up as I am always messing my machines up so this is a quick way of blowing an image back to them.
All I have to do is change the serial to the one that came with the machine and everything is happy - this is handy for people who come round with broken machines that need a reinstall (as long as they bring their key before anyone asks!) as well...saves me sitting in front of their machine.
As I have done 3 this weekend, it could have saved me some time!!
At least I am prepared for the next request