opencart customization

1- Integrate billing address form with samsa express portal and change it name to sender data then add the Sender number instated of recipient and make third option to get the registration details in the air way bill. 2- Add the weight field in shipping address. With condition in case it’s above 15 KG it will deduct 90 SAR not 45 SAR and in case it above 30 KG it will deduct 135 SAR and so on each extra 15 KG will deduct 45 SAR above the amount. 3- Ari waybill “AWB” should be generated automatically in case the customer balance available. and the order status should automatically changed to completed. 4- Shipment information item should be hiding till the customer charge or recharge his balance with minimum amount 90 SAR.