By "a while", do you mean "an hour or more"?

It looks like it is hung in the "umount /mnt/uba1", which (if I read the script correctly) happens just before the guage is killed and the "success" box is put up. So, it should already have created the image file and is just trying to get it out to the flash drive and un-mount the drive. And, this is taking an hour.

Hmm.

I think I'll try putting it on a HD partition... OK, that ran and completed in a few seconds, leaving me with a nice knoppix.img file. Maybe I can put it onto my USB fob and get it to still be recognized and used, even though it appears problematic to create it there in the first place.

However, since my USB fob is tied up trying to be un-mounted, I guess it's reboot time.