Sorry Harry I didn't knew that was important. I could boot from this livecd always.
The only problem I have is knoppix.img getting corrupted or something as I mentioned...
You told me that it could be the cd I believed you. I'm the newbie here man
Sorry if I misleaded you.

Let me try to explain the situation again
I'm using hda5 (Fat32) to host knoppix.img now. Nevermind NTFS. I'm using Fat32
I boot from livecd and enter home=scan to let the livecd find knoppix.img automatically and indeed it's always found.

Then I get those messages
/media/hda5/knoppix.img was not cleanly umounted. check forced.
Pass 1: Checking inodes, blocks, and sizes
Deleted inode 18 has zero dtime. Fix? yes
Deleted inode 19 has zero dtime. Fix? yes
(...)
then
>> /home/knoppix mounted OK from /media/hda5/knoppix.img
>> Read-only CD/DVD system successfully merged with read-write /media/hda5/knoppix.img

Fluxbox starts and I run the apps I want.
Fluxbox/Exit and the system shuts down normally.

Next time I boot I get similar errors on knoppix.img
I don't know why...

I'll try the home=/dev/hda5 as you said just to make sure
but as I said knoppix.img gets found with "scan".
I'll check that out tomorrow and let you know. It's 1:33 AM and I'm falling asleep

Thanks again for your time and sorry for the misunderstanding
xears