On booting from an MSDOS diskette:

Try NTFSDOSPRO. For what you want to do it is free.

From the web site:

"NTFSDOS Professional mounts your NTFS volumes and gives them drive letters, so you can run applications and use files on NTFS volumes transparently. NTFSDOS Professional is small enough to run from a MS-DOS boot diskette so you can even access NTFS volumes on a system where Windows NT/2000/XP isn’t installed or able to boot. This makes it ideal for repairing corrupt files or configuration problems that prevent a Windows NT/2000/XP system from booting."

http://www.sysinternals.com/ntw2k/fr...fsdospro.shtml

There are others, but I have used this one successfully.

Cheers