If you have Redhat, you need to get the RPM from http://linux-ntfs.sourceforge.net/
To mount a partition:
mount -t ntfs /dev/hdx# /mnt/windows
Replace the "x" and "#" with the appropriate entries:
hda = primary harddrive
hdb = slave
# = partition number.
And change /mnt/windows to whatever folder you want to mount it at, but make sure that folder exists.
To have it mount at boot, (as root) add something like this to your /etc/fstab:
/dev/hda1 /mnt/windows ntfs ro,umask=0222 0 0