Type "diskutil info /Volumes/volname", where volname is the name of the NTFS volume. From the output, copy the Volume UUID value to the clipboard.
Type "sudo nano /etc/fstab."
Type "UUID=111-111-111 none ntfs rw", where 111-111-111 is the UUID you copied.
Save and quit nano by typing Control-X, Y, and then Enter.
Restart your system.
I did that for the one NTFS partition I want access to from OSX. Now I get a kernel panic. I'm attaching a photo of the kernel panic. I can see it references the UUID of the partition.
I'm not sure how to undo what I did but I'm sure google will be my friend.
Is it worth trying to fix or am I better off just reinstalling Mountain Lion? I just installed Mountain Lion so I don't have anything valuable on the disk.