Force mounting bad harddrive
So, my computer crashes, won't boot so I'm trying to recover files with knoppix. It boots up fine in Knoppix, but when I try to mount the bad hard drive, it gives the whole NFTS is unclean message. I've looked around a bit and tried to force mount it, but it just gives me the same message...I'm a total newb, so I'm just trying to get ideas that are specific to my problem instead of trying to apply it from other ideas.
What are the force mount commands and any other ideas on how I might recover the files?
EDIT: btw, I got my version of Knoppix from the very bottom link on this page - version 5.1.1