Web page optimizer

How to go from 15kb to a file of 11kb without even changing one single line in a CSS file? Without ruining the looks and comments of our page. How to keep them intact for editing and highly parsed, optimized for speed and compressed but only for the visitors? How to do that without the stress of updating something when you change your code (you know the old one...take the code-> compress it-> create new css file and use that instead of the original)? That's a lot of questions and I wrote them without thinking at other possible ones. This script will give you the answers.