Is there a way to skip commissioning non-inventory line types (i.e. freight)?

We are using JDE Commission and Royalty set up to calculate commissions.  Non inventory line types are used during shipment confirmation and also by advanced pricing to add lines to the sales order.  These lines should not be part of the commission calculation.  We have set up two versions of sales update, one to not select these lines and write to F42005 & the other to only pick up these line types and not write to F42005.  Is there a better way?