Additional Reference document Category in PRDI

Hi,

When the ECC inbound delivery is distributed to EWM, certain fields like ASN, ERP numbers are displayed in the "Reference Document" tab under the refdoccat = ERP or ASN. Similarly if enter Bill of Lading in VL31N, in EWM it reflects under Refdoccat="BOL".

If I require some additional standard fields in VL31N, example, Invoice number, to reflect under EWM Refdoccat under a custom category called "INV", how can I configure this in EWM.

Also I have noticed system profile /SCWM/INB_PRD mapped to document type INB/PDI. How can this be used to create a custom profile.

Karthik