i would NOT reccomend using Knoppix to write to a Windows boot partition, it is NOT safe, atleast in my opinion.
in your seat I would try BARTPE or similar WINDOWS based rescue disk.
Knoppix is great to RESCUE files from a dead linux or windows install, can even find deleted files and such, but, writing to a already bad Windows partition is a 10% chance it will NEVER run again before whole partition is removed and reformatted, it has been my experience at least.