SYSGEN

  The OpenVMS System Generation utility (SYSGEN) allows you to tailor
  your system for a specific hardware and software configuration.
  Use SYSGEN to modify system parameters, load device drivers, and
  create additional page and swap files.

  More on-line help is available from the System Generation utility.  
  To invoke SYSGEN, enter the following command in response to the 
  DCL prompt:

  $  RUN SYS$SYSTEM:SYSGEN

  The utility responds with the prompt:

  SYSGEN>

  After you invoke SYSGEN, you can enter HELP or any of the SYSGEN
  commands.