download the Flash player on the Adobe.com (.tar.gz) and uncompress it - create a "plugins" directory in your ~/.mozilla - copy the libflashlayer.so you got in the archive into this plugins directory - then sudo cp -r usr/* /usr with Chromium/Knoppix 7, it's even easier

unfortunatly it seems Adobe won't upgrade this Flashplayer and some videos on Youtube are already not working...