If you don't have the directory already...you would need to be root
mount -t ntfs -o ro /dev/hdXY /mnt/ntfs
replace X with your device and Y with your partition-number.
I recommend you use "ro" read-only option since writing to ntfs is still experimental. Just copy over the file
cp /mnt/ntfs/dir/filename /home/~your-username/directory
If you want to mount it automatically at boot you would have to append the /etc/fstab file with appropriate information.