Help please! I am trying to figure out how to make my blog page show up in a "frame" with CSS. Someone did the CSS for me, I don't really understand how it works...

This is what the blank page looks like:
http://www.chicagocanine.com/chicagocanineblank.html

This is the blog page I want to show up with the header and sidebar around it:
http://chicagok9.blogspot.com/

You can easily figure it by following some example here (http://davejay.exit42design.com/entry/CSS/32/)