Multi purpose USB-stick
To create a multi purpose USB-stick (4 GB) proceed as follows:
Boot VirtualBox with Knoppix-HD-Installation
Insert USB-stick
Create with gparted a primary partition #1, 3 GB, fat32 formatted
Create with gparted a primary partition #2, 1 GB, fat32 formatted
Select 'Preferences/ Install KNOPPIX to flash disk'
Select '.. target device sdb ..', '.. directory containing KNOPPIX files "/opt/knx/knoppix"\
..' and '.. format device No ..'
In this case the installation will be done on /sdb1 and /sdb2 will be untouched.
Unplug and reinsert USB-stick; mount both partitions of stick
Copy '/KNOPPIX/' from /media/sdb1 to /media/sdb2; delete '/KNOPPIX/' on /media/sdb1.
If you boot with this multi purpose USB-stick, '/KNOPPIX/KNOPPIX' will be found on the partition #2\
and you can also create the persistent memory on partition #2.\
But if you boot with another OS (perhaps Windows) and insert this USB-stick,\
then you can only use partition #1 of the stick.\
Don't delete '/boot/' and 'ldlinux.sys' on partition #1 of this stick!