Oooooooooh! That would have been good to know from the beginning. :lol: My bad for not asking the right questions.
Now that I know what you're doing, and I've dug enough in your CSS, I can safely tell you that there's no way you're going to do it with your current template, short of completely hacking it up.
The template you're using is fixed width; it's made to be a set width regardless of the browser's winodw size. Your existing site is fluid width, stretching automatically to fill the space. This is a cornerstone solution when building any template. To change from one layout to the other requires completely rebuilding, and is way beyond anyone's ability to support in forum posts.
Had I known what you were really after I would have given you the straight sooner. Sorry about that. :unsure:
Frank Koehl
"Cleverly Disguised as a Responsible Adult"
frankkoehl.com