Change items at converting a Planned Order into a Purchase Requisition (MD04)

Hi,
I have to change items of an Purchase Requisition before saving.

If I work with ME51N or ME52N I can change it easily with the method "PROCESS_ITEM" of BADI "ME_PROCESS_REQ_CUST", but when I convert a Planned Order into a Purchase Requisition via MD04 the method is not called.

Is there any other BADI, SMOD enhancement,... I can use?

Best regards Patrick