Freight Line

In our client business the freight line is added upfront in the starting while creating the sales order.Now the requirement is that the invoice send to the customer should have all the detail lines which includes product and freight.

As freight line is non stock line,I have given the status of the freight line as 520-580(Print Invoice).Now How should i stop the freight line to avoid not to go through the invoice program R42565 individually without the goods line come till 580nbecause the invoice should print all the line information.

Please note R42565 is running on scheduler.