How to create my own boot.cat file?

[Blue]

Is there a program or something like this?

[Tech2k]

Is there a program or something like this?

It is not needed.All you MUST have in your KNOPPIX directory is the boot.img and the KNOPPIX cloop file.The boot.cat is created when you run the mkisofs command.
I use,

mkisofs -r -J -b KNOPPIX/boot.img -c KNOPPIX/boot.cat -o my.iso knx_cd

where knx_cd is my directory setup like the Knoppix cd with a KNOPPIX directory inside that holds the KNOPPIX cloop file and the boot.img.

I also put a tech directory in /knx_cd with my scripts,docs,tools pkg.list and such outside the cloop file.After the mkisofs command is run and my cd is burned the boot.cal magicaly appears inside the KNOPPIX directory.