Is the question about how to send Program Changes from Bandhelper? Or how to use Program Changes to select sounds on the VR09? If the latter, Program Changes can be used to change which tone is called up within an individual section, but the VR09 does not support using MIDI Program Change to switch Registrations. This is the opposite of the YC61, where you can change Live Sets (its equivalent of Registrations) using MIDI Program Change, but you cannot use Program Change messages to change the voices assigned to the individual parts.