I would love to see a MS-DOS boot disk get into my Windows 2000 Partition. No way man. If you loaded a MS-DOS boot disk in my system off the A drive and typed C: I wonder where you'd end up? Definitely not in my Windows 2000 Partition. In fact you might end up in my little boot partition but I doubt that also. DOS reads FAT-12?
An MS-DOS Floppy *is* Fat12. You might be talking about something
else.
Regardless, it isn't MS-DOS that does the "getting in to"... It is
various utilities that run in MS-DOS. Name any file system and there
will likely be a DOS driver for it.
Hell, even Ghost itself can get you at the files. Just Ghost a
partition and open the image with Ghost Explorer on another system.
The file systems permissions don't mean a thing in an image file.
If you even allow your system to boot from drive A:, your security is
non-existent.