Simply copy the executable in a directory that is included in your
search path.  I you don't have any idea, do the following:

1) mkdir c:\utils
2) copy d2d-2.exe c:\utils
3) add "PATH=%PATH%;C:\utils" to your AUTOEXEC.BAT
4) set "TMP", "TEMP", or "TMPDIR" to a valid directory to store temporary
   files there.
