MD!  1.3 a replacement for the DOS MD MakeDirectory command
1.  It will automatically create higher levels of directory
    structure.
2.  It works even when when there is a trailing backslash on the
    directory name.
3.  You can redirect any error messages with >NUL:
4.  If a file already exists by that name, (nearly always
    created by by a failed file copy to a non-existent subdirectory)
    the file is automatically deleted and the directory is made in its
    place.
5.  MD! sets ERRORLEVEL if it fails.
MASM/OPTAsm source included.  May be freely distributed and used for any
purpose except military.  Version 1.3 just embeds the new address.
WARNING! MD! only works with 8.3 filenames.