[Plugin: Events Manager] Edit booking form

Great! That is what I was looking for!
But now… If I edit the input form, how do I insert these data into the DB?

Mhhh, I’m having some problems editing custom fields.
I edited booking-fields.php with my custom fields, then I edited classes/em-booking.php with the same values:

/**
	 * Contains an array of custom fields for a booking. This is loaded from em_meta, where the booking_custom name contains arrays of data.
	 * @var array
	 */
	var $custom = array(
		'name' => array('name'=>'name','type'=>'%s'),
		'family_name' => array('name'=>'family_name','type'=>'%s'),
		'ASWG' => array('name'=>'ASWG','type'=>'%s'),
		'date_place_arr' => array('name'=>'date_place_arr','type'=>'%s'),
		'date_place_dep' => array('name'=>'date_place_dep','type'=>'%s'),
		'tshirt' => array('name'=>'tshirt','type'=>'%s')
	);
	/**

What should I do now to make it work?