How to add a standard field for POWL list?

Hi,

we're missing the standard PO field PARTNER_PROD in the POWL queries for SRM purchase orders (using extended classic scenario). This field is not included in structure /SAPSRM/S_POWL_RESULT_PO_ITEM. Is it possible to add this field without a modification to this structure and is more action required to get this field available and filled?

Thanks

Hubert