Klaus Knopper and Co. included the capability to both create and mount (read-write) a persistent home from NTFS in Knoppix 3.8.1. (It works with Unionfs.)

To create it (assuming your NTFS partition is the "C" drive, aka "hda1"):

- In the \KNOPPIX directory on the CD, there's a GUI utility named "MkImage-ct.exe". It's in German, but easy to understand. Run it in Windows and select the partition you want to create the persistent home on, and use the slider to choose a size. Click the button to create an empty persistent home file ("C:\knoppix.img").
- Run Knoppix from the CD (without a persistent home, if you've already got one on another partition). In KDE, select "Configure > Create a persistent KNOPPIX disk image" from the "Knoppix" menu (the penguin button on the Kicker bar) and follow the prompts. Select your NTFS partition. Knoppix will give you several dire warnings; click "OK". Knoppix will find your "knoppix.img" image, format it, and copy data to it. You must reboot.

To use it:

- Restart Knoppix. At the "boot:" prompt, enter "knoppix home=/mnt/hda1/KNOPPIX.IMG" (it seems to be case-sensitive) and follow the prompts when it mounts your persistent home. (Be sure to check off all the options [using the spacebar] and choose "OK" if you wish to save to your new persistent home.)

Notes:
- There's lots of you out there who know more about Knoppix and Linux than me. Please add your corrections/clarifications.
- To harryc: This capability probably existed in 3.8 CeBit; I just didn't think to look for it.
- Can this be used in conjunction with the ISO on the same NTFS partition?