I installed the latest version of the zencart (1.35, or something like this). Went through forums for three days, but couldn't find the answer to my question:
I want the site to have fixed width and to be centered on the browser, like this (just an example):

http://giftshopateastman.com/cart/in...ain_page=index

Where in the code do I make the fixed width and align all the pages?
My website is:
http://www.longdogfatcat.com/zencart/

Please help..