If you want to change the pre-set Shipping or Payment method, please enter the
following rule field under: 'Settings' -> 'Advanced Settings' ->
'Payment methods' -> 'Rules for the order pages' Here you should see: Rule for the first order page($RULE_ORDERPAGE_1)If you want to change the Payment methodif ($autoset_payment_method) set_payment_method ("Invoice");
If you want to change the Shipping methodif ($autoset_delivery_method) set_delivery_method("FedEx");
In the above examples, the payment method will be set to Invoice and shipping
method to FedEx.