The drivers are for Rockwell ISA modem only. It is called a K56 Flex & V34(33600bps).
This is in fact a two disk zipped together zip file. Download the file and unzip it. Then unzip the two zipped files on to floppy disks and you will have the full installation instructions included in the manual which is on the disks. I have been searching for this driver set for ages and eventually came across the disks. Any comments ? email me.