I have had some success adding files to the knoppix iso. So if you've simply wanted to add files to the knoppix cd here is what ya got to keep in mind. If you've tried adding files before using a program like magiciso or winiso you'll get a checksum error when you try to boot. The problem is that in the boot/isolinux/boot.cat file has the wrong checksum in it. You'll need to update that file to get it to work. I don't think you can do that with winiso or magiciso. So here is what I did instead.

1. Use winrar to extract the iso file to a directory.

2. Add whatever files you want to the directory you extracted the knoppix iso to

3. Then use mkisofs from cdrtools (there is a version of this for windows)

here is the command line I used. I had extracted the cdrtools to d:/cdrtools/ and put my custom knoppix files in d:/cdrtools/cdiso

Change directory to d:\cdrtools\cdiso

Mkay now were ready to run mkisofs

..\mkisofs -o ../isoname.iso -R -J -V "Distro Name" -hide-rr-moved -v -d -N -no-emul-boot -boot-load-size 32 -boot-info-table -b boot\isolinux\isolinux.bin -c boot\isolinux\boot.cat -A "Install CD" .

The final . is important... you'll end up with an iso file called isoname.iso

With this meathod I took knoppix 3.7 and added the drivers for my wifi card. Unfortunatly when I modprobe ndiswrapper everything crashed (but the wifi card like went on). Probobly because the ndiswrapper needs updating. It's version 0.8 on knoppix 3.7. ndiswrapper is upto 1.0 now