| How do you normally mount a floppy? If you use a GUI, you will have to edit your /etc/fstab file. As root, open it up, and find the line which begins with
/dev/fd0
add another line exactly like it, but instead of /dev/fd0 and /mnt/floppy (this might be a bit different depending on the distro, I can't remember what it looks like in knoppix) use /dev/fd1 /mnt/floppy2. Basically, /dev/fd0 is the first floppy device, /dev/fd1 is the second.
Note that you will have to create the directory /mnt/floppy2.
If you wanted to mount a floppy to /mnt/floppy via the CLI, just do mount /dev/fd1 /mnt/floppy |