Customizing Knoppix!

Hi all,

I just now heard about Knoppix. I have some basic doubts. Eventhough it may appear silly, please help me out as I am a newbie.

* Is it possible to create a fully customized distribution from Knoppix?

* Where are the source codes (for all packages and installer) available for the latest Knoppix release?

* Is Knoppix a community like Debian or a commercial organization?

Thanks in advance,
Praveen.