goto you mnt directory
-open a new terminal
-type cd /mnt
-type mkdir ntfs
google the ntfs driver - i think its from sf.net there is a tutorial about installing it - look though ask.com - thats how i found it - see url at bottom for more help!
once it is installed type
mount /dev/hda1 /mnt/ntfs -t ntfs -r
that will mount your c drive in the dir called /mnt/ntfs - also that assumes that you windows partition is on hda1 - if not you will have to chnage that part - see below
so if you wanted the windows directory it would be:
/mnt/ntfs/WINDOWS
remember it is case senstive and on my xp install WINDOWS is upper case
check out this page
http://linux-ntfs.sourceforge.net//
it tells you how to mount the drive automatically and how to tell which drive and partiion the windows is installed in