that is not the most up to date mirror i have seen, the
two files

# KNOPPIX_V5.1.1CD-2007-01-04-EN.iso
# KNOPPIX_V5.1.1CD-2007-01-04-EN.iso.md5
should be enopugh for a look and most file recovery operations.

but NEVER try to write to a NTFS hdd with Linux, i have seen far to many crashed filesystems to trust that, looking and copying from is ok.