I have a large customer who purchases my items with 2 different codes on their end.  I have not convinced them to purchase differently.  To have our items received correctly I change their codes on the Sales Order.  Line 3 of item, CUST # code. This works for the Sales Order. When I print the Packing Slip it does not contain the changed CUST #, but has the original CUST #.  How can I pull in the changed CUST # from the Sales Order?