Ehm, I really don't know if this will work, but you might be able to just hook up an optical cord from the output of the VF80 into the input of the VF160, and then play the VF80 while the VF160 is recording. If this doesnt work, the only way is to swap the files from removable media(scsi zip, scsi cdrom, adat via pc)
EDIT: Make sure you verify this method works(I have no idea, it's just a theory), optical cables are frigging expensive