Nortons ghost 14 how does it work?

installed ghost and took a one time back-up of my c: drive 8G to an external drive.  what i dont get is should my drive become corrupt or need the image re-installed how would i do this?

 

 

i assumed i would create a boot disk that a could use to point to my norton backup folder on my external drive?

 

i cant find a boot disk though? (or am i just blind?)

 

i want to make sure the back-up works rather than wait till i need it only to find it doesnt.

 

 

 

i have a fresh install with all programes,updates,drivers installed and want to use the back up as n image i can re-install every few months to keep it running smooth