In Knoppix 3.7 (knoppix26) my USB stick is detected as /dev/uba1 and I can read and write files to it.
But when I try to create a persistent home directory, configure does not give me the choice of /dev/uba1, only /dev/hda1.
I tried switching read only off on /dev/uba1, but still /dev/uba1 does not show up in the configure choices.
I can save the home directory and config to /dev/hda1 though.

Scott