Change layout in inside pages

Hi,
I'm using Game magazine template and would like some articles on main menu to display in full page layout. I don't want any side bars for those pages.

This demo page has the layout I am looking for: http://demo.gavick.com/joomla25/gamemagazine/index.php/typography

How can I duplicate this?
Thanks.

Disable any modules assigned to display on sides ( left or right ) showing on this item if this item has a menu item linked to it.