Got mycopyof knoppix last Thursday. As it happens I had a screwed Win system to fix. It had been hit by a virus and Windows was screwed.
I needed to get 600 MB of files from HD. I booted from Knoppix, mounted the Win drive, right clicked on the CD Writer icon. Choose to write data to cd option. Application launched, choose files and 4 minutes later I had my backupp!! Great stuff.