back to cd after install?

This may seem like a silly quetion, but is it possible to install Knoppix to the HD. Then do modifications. Then re-build an ISO to get it back on cd? I've been working with the re-mastering and it's going ok. (although a little confusing) It just seems it would be easier to go to the HD and then back. Am I asking the impossible?? :?:
thx

Yes, yes it is. Here's a mini-howto describing one of the ways to do it: http://www.stirnimann.com/mystuff/doc/knoppix.txt