I think you will find it easier to do it the other way arround..
incorprate a multiboot cd into knoppix... knoppix uses isolinux so you can easly add floppy images..

Thats what I have done, Im working on a support cdrom that we can distribute with all of our new computers.. I put a bunch of images from the ultimate boot cd like aiada32 and all the drive diagnostics and added em to my knoppix cd