How to Integrate Style for Genesis Themes

Hi!

I’m using Studiopress’s Genesis Framework.
I’ve followed every step to integrate the style to my theme from this link: http://designwall.com/guide/dw-question-answer-plugin/
However, on Step 2, upon checking my themes Page.ph file, this is all I saw:

<?php
/**
* Genesis Framework.
*
* WARNING: This file is part of the core Genesis Framework. DO NOT edit this file under any circumstances.
* Please do all modifications in the form of a child theme.
*
* @package Genesis\Templates
* @author StudioPress
* @license GPL-2.0+
* @link http://my.studiopress.com/themes/genesis/
*/
//* This file handles pages, but only exists for the sake of child theme forward compatibility.
genesis();

Do you have any suggestion on how I could go about integrating the style?
Your assistance is much appreciated.
Thanks.