This PHP code is a copy of the PHP code used to register widgets in the functions.php file. Copy the code and rename all instances of home to custom and paste at the end of your child themes functions.php file.

Custom Page Template Widgets

/** Register widget areas */
genesis_register_sidebar( array(
	'id'			=> 'custom-top',
	'name'			=> __( 'Custom Top', 'magazine' ),
	'description'	=> __( 'This is the custom top section.', 'magazine' ),
) );
genesis_register_sidebar( array(
	'id'			=> 'custom-left',
	'name'			=> __( 'Custom Left', 'magazine' ),
	'description'	=> __( 'This is the custom left section.', 'magazine' ),
) );
genesis_register_sidebar( array(
	'id'			=> 'custom-right',
	'name'			=> __( 'Custom Right', 'magazine' ),
	'description'	=> __( 'This is the custom right section.', 'magazine' ),
) );
genesis_register_sidebar( array(
	'id'			=> 'custom-bottom',
	'name'			=> __( 'Custom Bottom', 'magazine' ),
	'description'	=> __( 'This is the custom bottom section.', 'magazine' ),
) );