I am able to complete a successfull Knoppix HD install on /dev/sda (root, swap, ...)
But the sda partitions are only visible to Knoppix.
It even uses the swap.

But the SCSI hard disk is just not visible to the BIOS so I cannot get it to boot from /dev/sda.
See all the details here:
http://www.linuxquestions.org/questi...d.php?t=453410

There are no other hard disks on this PC, just a CDROM on /dev/hda.

Is there a way to boot from a floppy and have it recognize the SCSI hard disk
so that the HD installed Knoppix can boot up from /dev/sda partition?

The floppy built at the end of the knoppix-installer does not help.
When I boot from this floppy, I get the expected Grub error:
"Error 21: Selected disk does not exist."

But if I boot off the Knoppix CDROM, there it is - the
whole Knoppix HD installed on /dev/sda with all the files.