VMS Help START, /QUEUE, Qualifiers, /PROCESSOR  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PROCESSOR=filename
       /NOPROCESSOR

    Requires OPER (operator) privilege to change the file name from
    the one with which the queue was initialized.

    Allows you to specify your own print symbiont for an output
    execution queue. You can use any valid file name as a parameter
    of the /PROCESSOR qualifier. The system supplies the device and
    directory name SYS$SYSTEM and the file type .EXE. If you use this
    qualifier for an output queue, it specifies that the symbiont
    image to be executed is SYS$SYSTEM:filename.EXE.

    By default, SYS$SYSTEM:PRTSMB.EXE is the symbiont image
    associated with an output execution queue.

    The /NOPROCESSOR qualifier cancels any previous setting
    established by the /PROCESSOR qualifier, and causes
    SYS$SYSTEM:PRTSMB.EXE to be used.