Just did a little more research and came across this article. Maybe I am misunderstanding, but by looking at this, one can use the utility QTparted(already on the Knoppix cd) you can leave your file system NTFS.
http://mlf.linux.rulez.org/mlf/ezaz/ntfsresize.html
Anyone with a little more knowledge than me would care to take a look at it please and see what you get out of it.