cubecart customer contact in admin panel

need some modification to electronic store running cubecart 4. currently admin can only contact the customers who made the orders only if by changing the status of the order ( to processing, complete ect). no other communication is possible. this project to edit the cubecart in order to communicat to the customers even though the admin do not have to change the order status; this is to inform the customer of the methods of payment and other informations.