No sidebar template?

Hello –

I am attempting to delete the sidebar on my webpage and then center the text and images I insert.

I see a “no sidebar template” when I go into the CSS editor, but I’m not sure what to do with it as it only reads this:

<?php /* Arclite/digitalnature

 Template Name: Page without sidebar
 */
 get_header();

 include(TEMPLATEPATH . '/page.php');

//exactly the same as page.php
?>

If I want to use that template, what do I do? I’ve tried inserting include(TEMPLATEPATH . ‘/page.php’); and include(TEMPLATEPATH . ‘/page-nosidebar.php’); into the page.php css, but I just get error messages.

I’m using Arclite and my webpage is chumstudents.com.

And yes I know jack about CSS, but I’m trying :/. It seems like this must be simple…