If you are in kde, you can use "kdesu kate /etc/fstab" to edit the file.
You can also use vim or emacs to edit it. There probably will be a vim or vi or vim-minimal available in any boot disk or rescue mode.
If the entire drive is formatted with the ntfs filesystem, then this disk will contain 1 partition.
Another option is adding the "noauto" option in the /etc/fstab entry for the partition. An entry with "noauto" in it will not be mounted when you bootup but you can manually mount it later.
There are man pages for both "mount" and "fstab". For mounting ntfs filesystems, the ntfs kernel option needs to be loaded. It may be already.
An alternative is to use ntfs-3g instead. This will give you read/write access using a "fuse" user land (vs kernel) driver. For this you need the "ntfs-3g" and "fuse" packages installed. Then the "fuse" kernel module needs to be loaded:
Then use the filesystem type "ntfs-3g" in /etc/fstab or as the filetype "-t ntfs-3g" in a mount command.
I was thinking that maybe what you are trying to do is remove an extra "windows 2" entry from the boot menu. For that you need to simply edit out the section from /boot/grub/menu.lst.