Vista - Vista recovery drive.......

Hello frieds,
Someone told me that if i format my vista and if i did not have a a recovery drive , then i might not be able to use the same key again ....
I have installed a vista business at my pc and i want to create a recovery drive so that i can recover my activated files from there. So can someone help me in letting me know can i create a recovery drive backing up only my c:\ drive which is having vista.
If i create complete pc backup the i am having atleast 250 gb of data and so i won't be able to backup it all.
So i request someone to plz read this and post a comment on how to tackle this problem and whether the second line is correct or not.....

You cannot, but you can use a program such as Acronis to image your C drive,
and if neccessary you can recover using that image file.
Any way assuming you have the Vista reinstallation cd or a recovery cd you
can recover your PC using the key supplied with the Vista Business cd


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