As root:
#mkdir /media/windows
#mount -t ntfs /dev/hda2

In plain english:
1. Create a directory to mount your windows partition
2. mount -t (-t is the option for type of filesystem; usually ntfs or fat32)
3. /dev/hda2 (specify which device to mount) (you can do a fdisk -l to see what device your windows partition is on)

Now you can cd to /media/windows and view your windows files

I wouldn't suggest working with your windows files as root.
#chown "your_user_name" /media/windows

Now you can work with your windows files as a regular user.

To unmount:
#umount /dev/hda2