Thanks for you interest...

What I understood of your project was to use a CDRW so that a writable part as home drive could be used.

In my case that is not exactly what I need.
My goal is to :
-Start knoppix livecd.
-Use persistant home script (standard in each knoppix) to create you own home file (which is compressed).
and now it comes :
-Rework the knoppix livecd ,so that this home file which will be then also present on this livecd, will overwrite the default home drive (or use it directly at boot).This also means that as much programs as possible from the livecd have to be removed ,in order to make place for this home drive file .
Using the KDE startupoptions (much like the windoze startup) ,will enable people to easely create their own adapted knoppix easely.
I already used this principle using a HDbased knoppix. And it work fine.
BUT... transferring this principle to a livecd is beyond my knowledge.

It is much like the morphix principle ,but my goal is to create this for newbies like me who's knowledge is very limited and for which the use of Morphix is already too complicated .

I hope this will explain it ....

Koen..