I used libgphoto2 instead of gphoto2. The commands are from the second link since you didn't much like the first one. However you can check if libgphoto2 is installed on Knoppix (which I'm not running) with:
COLUMNS=150 dpkg -l|grep gphoto

gphoto2 --print-usb-usermap >> /etc/hotplug/usb.usermap #makes hotplug recognize different cameras. Use this with the package gphoto, haven't tried this.
But with libgphoto2 (which I used) do: /usr/lib/libgphoto2-2/print-usb-usermap > /etc/hotplug/usb/usbcam.usermap
If it doesn't work do: /usr/lib/libgphoto2-2/print-usb-usermap >> /etc/hotplug/usb.usermap
The ">>" makes it add the output to the end of the last file in the command.
A ">" writes/overwrites the output to the last file.

cp /usr/share/doc/gphoto2/linux-hotplug/usbcam.group /etc/hotplug/usb/usbcam #copy the first file to the second one (usbcam.group -> usbcam)
mcedit /etc/hotplug/usb/usbcam (change GROUP=camera to GROUP=usb), save and quit #mcedit is an editor, you can use any one you like. change the line that says GROUP=camera to GROUP=usb

You also need to give execute permissions to the script with: chmod 755 /etc/hotplug/usb/usbcam
And add your user to the group usb: adduser dmpop usb