hey man,
What you're going to want to do is boot up to knoppix, after booting to knoppix, assuming her internal drive is IDE and external is USB, type dd if=/dev/hda of=/dev/sda now this will onliy work if the internal drive is IDE and first master and the external is the only USB/SCSI/SATA plugged into the machine
this should work, but i do not guarantee the safety of your data