The RENAME command changes the name of the file specified to a new name.  This
command may also be invoked using the abbreviated version REN.  The command
format is as follows:

          RENAME [d:][path]filename[.ext] filename[.ext]

    or    REN [d:][path]filename[.ext] filename[.ext]

Only the first filename may have its disk drive and path specified.  The second
filename will use the same drive and path as is specified for the first
(NOT the default drive and path as you may have assumed).  This means the
RENAME command may only be used to rename files within the same directory and
may not be used to rename files from one directory to another (that is a two
step operation using the COPY and ERASE commands).  The global characters "*"
and "?" may be used in the filename and extension (see the help file GLOBALS
for details).  DOS will not let you rename to a filename that already exists.

Examples:

RENAME SFILE DFILE  - Rename the file SFILE to DFILE in the current directory.

REN \LEVEL1\*.HLP *.DOC  - Rename all the file extensions .HLP in directory
                           LEVEL1 on the current disk to .DOC.
