@luther:

I don't think you have to sort the files.

I think it would be a good idea to create a new directory 'knx402' on an HDD. In that directory create a subdirectory 'master'.
Copy the directory KNOPPIX and its subdirectories from the DVD to the 'master' directory.

In a terminal change to the 'knx402' directory and remove the file master/KNOPPIX/isolinux/boot.cat
Use the program genisoimage to create a bootable ISO image.
Code:
genisoimage -l -r -J -V "KNOPPIX"  -b KNOPPIX/isolinux/isolinux.bin -no-emul-boot -boot-load-size 4  -boot-info-table -c KNOPPIX/isolinux/boot.cat  -o ./knx402.iso ./master
Burn the new ISO image on a CD-R and try it out.

I hope that helps.