Routine for copying sales order header text to invoice

Hi friends,

My requirement is to copy header texts from sales orders when creating an invoice (VF01). In T-Code VOTX the system suggests two routines :

1 - DATEN_KOPIEREN_01 include LV45TE01

2 - DATEN_KOPIEREN_02 include LV45TE02

Does anyone already use one of these routines? When invoicing more than one sales order does the routines work fot this case ?

Best Regards.