I have downloaded the boot image file boot.img and made a bootable floppy, I also downloaded the KNOPPIX.iso and store at D: which is /dev/hda5.

Then I boot up the notebook from the floppy, and type
"knoppix bootfrom=/dev/hda5/KNOPPIX.iso lang=us"

The floppy linux boot up and dislpay:
"Can't find KNOPPIX filesystem, sorry.
Dropping you to a (very limited) shell.
Press reset button to quit."

What should I do to make it bootable from floppy and ISO-image?

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Another question, I have installed GRUB. How can I make the floppy image boot.img bootable from GRUB?

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I know I have so many questions, hope you do mind to help me.
Thanks in advance.