ISO knoppix custom. and installation on ext4

[Jeffery Mewtamer]

One of my biggest complaints with Knoppix is how crippled the distro is when it comes to hard drive installs. Among other downsides to running Knoppix from a hard drive, as far as I know, there is no support for installing to anything other than ReiserFS.

[rajibando]

... my biggest complaints ... hard drive installs. ...

Why should you try Hard drive install? You can plain install Debian and add remove packages to suit your needs.
Anyway, there is another method - boot from iso using grub and use a separate partition such as ext4 where you could store your persistent files. Ext4 because crash data can be recovered better in ext4. You could use this from a USB pendrive (flashdrive) or HDD. The choice is yours. I have a post which covers the HowTo part. Use the right Search Words and you shall find it.

... no support for installing to anything other than ReiserFS.

There is! We have ourselves and help others via forum. There is plenty information available. That way we remain independent rather than be offered silly proprietary packages on a platter which costs money when there are better ones that are available for free. And for other better, patented software, we have linux versions for nearly everything, except Adobe Flash, etc. FOSS has not built an IDE to build HTML5 alternative to Flash. But it is going to happen.

One of the most important things we need to learn is to judiciously use search keywords, and this Google has taught us. Once you have mastered that, you will find what you need.

Living with Linux for so many years, I can say that what members don't like is to spoon-feed and solve your problems for you, unless you try to figure it out for yourself. Sometimes, it can feel like horrible but as you learn you will find the pleasure of discovering something yourselves.

I could just have given you the link, but not doing it, I know with a little try you will find what you need.

Yes, it is apparently rude, but you still have relatively cheap proprietary software in the market maybe because of FOSS.

We need to ask the right questions, and we will be answered.

There are these things to learn (not immediately, of course, but gradually, according to your time and patience):
(1) How to run commands in CLI, and this is available in man pages, which is technical and difficult to understand for a lay user, but follows a structure accepted throughout the short history of computers. Anyway, you decide. Go to /usr/share/man and see the list of man pages. Whatever you have there, without the extension name, can be read with command "man name", e.g., "man man" for knowing about man pages, man gedit for reading about gedit, etc.
(2) Bash scripting tutorials would help you understand how to use commands together. You choose whichever you can understand. Search in the net for bash tutorials.
(3) https://wiki.debian.org/ read these wikis, when you find time. They will help.
(4) https://www.debian.org/doc/books, one of which would definitely help you, depending on your level of computing awareness.