Recently, my laptop crashed and now all that shows up is the BSOD saying "UNMOUNTABLE_BOOT_VOLUME'

I have large amounts of data, about 30 gigs which I need to extract from the laptop.

I've decided to use Knoppix to extract the data, but sadly, I'm a uber n00b in Knoppix.

I've been hearing horror stories about how Captive-ntfs can screw the whole HD up?

If that being the case, I need to know of a way to copy all that data (30 gigs of NTFS files), into a new HD using Knoppix. Without any loss of data.

I apologize if this question sounds repetitive in the forums but I am at a desperate state and rushing for time. The data in the HD is extremely important and I cannot risk doing something wrong.