// Remove the default header
remove_action( 'genesis_header', 'genesis_do_header' );

// Add custom header
add_action( 'genesis_header', 'sk_do_header' );
function sk_do_header() {

	echo '<img src="http://genesis.dev/wp-content/uploads/2014/11/header-default1.jpg" />';
	do_action( 'genesis_site_title' );
	do_action( 'genesis_site_description' );

	// if ( ( isset( $wp_registered_sidebars['header-right'] ) && is_active_sidebar( 'header-right' ) ) || has_action( 'genesis_header_right' ) ) {
	if ( ( is_active_sidebar( 'header-right' ) ) || has_action( 'genesis_header_right' ) ) {
		genesis_markup( array(
			'html5'   => '<aside %s>',
			'xhtml'   => '<div class="widget-area header-widget-area">',
			'context' => 'header-widget-area',
		) );

			do_action( 'genesis_header_right' );
			add_filter( 'wp_nav_menu_args', 'genesis_header_menu_args' );
			add_filter( 'wp_nav_menu', 'genesis_header_menu_wrap' );
			dynamic_sidebar( 'header-right' );
			remove_filter( 'wp_nav_menu_args', 'genesis_header_menu_args' );
			remove_filter( 'wp_nav_menu', 'genesis_header_menu_wrap' );

		genesis_markup( array(
			'html5' => '</aside>',
			'xhtml' => '</div>',
		) );
	}

}