You need to install Norton Ghost onto the HDD you want to get the extra space from, so you need windows on it...
Just use a spare drive (if you have one) as the one you want to gain the space from and then you won't overwrite anything on your main drive.
I might give this a try...
If cars had followed the same developmental path as computers, a Rolls Royce would cost £60, get a million miles per gallon and explode once a year, killing everyone inside.