Pl i need suggetions for creating new smartform for PO

hi all,

I need u'r suggetion for creating a new smartform for Purchase order.

Actually business is already using modified script ZMEDRUCK,

now they want a new smartform for the same built from scratch.

could any one suggest me how do i proceed in building a new smartform.

am not asking how to create a smart form , but any way we will attach this smartform to the print program in nace. will the print program be the same i.e sapfm06p,

and is there any standard smartform for PO where i can make changes.

Thanks & Regards,

Deepak.