VC Environment variable
 Using the Commander with  a  RAM  disk  presents  a  special
 problem: if you save the setup, or if you  change  the  main
 menu file or the main extension file, these changes  will be
 made to the files on the RAM disk. Which means  you'll loose
 your changes as soon as you reboot or turn off your computer.

 The Commander provides a solution to this  problem. You  can
 put a line  into  your  autoexec.bat  file  that  tells  the
 Commander where to find these files, as well as other file's
 it needs that you haven't copied to the  RAM  disk. Put  the
 following line into your autoexec.bat file:

               set vc=c:\progs\vc
                      +---------+
                           |
            The path on your hard disk where
            the Commander's files are stored.