Adding custom header-level tabs to transactions ME21N, ME22N, ME23N

Hi all,

I need to add custom tabs with fields to the header level of transactions ME21N, ME22N, ME23N. I also need to be able to store the data entered in those fields.

I know there is a BADI ME_GUI_PO_CUST that allows you to add custom fields, but does it also let you add new tabs to the header level?

Thanks!

Roman D.