add-widget-area.php

<?php

// Don't include the PHP tag

genesis_widget_area( 'optin', array(
		'before' => '<div id="sfws-optin" class="sfws-optin widget-area"><div class="wrap">',
		'after'  => '</div></div>',
	) );

enqueue-pretty.php

<?php

// Don't inlude the PHP snippet above

add_action ('wp_head', 'sfws_add_pretty_photo');
function sfws_add_pretty_photo() {
	if ( ! (is_home() || is_front_page() ) ) { 
 		return;
	}
	
	// Scripts
	wp_register_script( 'sfws-prettyPhoto-script', get_bloginfo( 'stylesheet_directory' ) . '/js/prettyPhoto.js', array( 'jquery' ), '1.0.0' );
	wp_enqueue_script('sfws-prettyPhoto-script');
	
	//Styles
	wp_register_style( 'sfws-prettyPhoto-style', get_bloginfo( 'stylesheet_directory' ) . '/css/prettyPhoto.css');
	wp_enqueue_style('sfws-prettyPhoto-style');
	
	?>
	<script type="text/javascript" charset="utf-8">
  		jQuery(document).ready(function(){
    			jQuery("a[rel^='prettyPhoto']").prettyPhoto({
			social_tools: false,
			theme: 'facebook'
			});
  		});
	</script>
<?php
	
}

hide-it.css

#sfws-optin {
	display:none;
}

register-new-widget-area.php

<?php

// Don't inlude the PHP snippet above

genesis_register_sidebar( array(
	'id'          => 'optin',
	'name'        => __( 'Email Optin Widget', 'anytheme' ),
	'description' => __( 'This will hold your email form. Maybe even popup in a lightbox.', 'anytheme' ),
) );