VC Environment variable
 Using  the  Commander  with  a  RAM  disk presents a special
 problem: if  you  save the setup, change the main menu file,
 or change the main  extension  file, these  changes  will be
 made to the files on the  RAM disk.  As a result you'll lose
 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 files
 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.