Auto message determination for Freight Vendor when different from main ven

Hi All,

We have an issue with auotmatic output determination of a purchase order for a freight vendor, when the freight vendor is different from material vendor.

We are creating a PO for raw-material for vendor 'A'. In the same PO we are maintaining freight condition (FRA1/FRB1/FRC1) and for that condition we are maintinaing a different vendor (e.g Fedex). Now when we save the PO we want the system to output the PO via FAX to both the Vendors (without any manual intervention).

How can we achieve this?

Thanks in Advance

Venkat