Want to center this

I downloaded a Wordpress template and I'd like to center it (the whole thing)... what would be the easiest way?

Blog is here: http://www.morbidforums.com/blog/

Stylesheet is here: http://www.morbidforums.com/blog/wp-content/themes/leia-en/style.css

 

make a container div for the whole layout

put this before <div id="cabecera">

<div id="container">

Code (markup):

and a </div> after the last </div>

then in css add this line

#container {width: 1000px; margin: 0 auto;}

Code (markup):