Thats tough.
It isnt recognized as NTFS or anything and the the original disk label
and file allocation table (or the like) has more than likely been scrubbed..
not the best deal. so while the data is still there more than likely the thing
that tells it where its at isnt.
I would see if I could mount the "unallocated" via knoppix and see what i could see..
http://www.knoppix.com bootable linux from a cd, always a must have
you may be able to find a disk recovery utility that might help you find what
you have lost on the net somewhere
good luck
cain