How can I modify the system prompt (i.e. MPEXL:) ?  I'm using MPEix4.0 and soon
moving to 5.0
 
 
 
       The contents of this message express only the sender's opinion.
       This message does not necessarily reflect the policy or views of
       my employer, Merck & Co., Inc.  All responsibility for the statements
       made in this Usenet posting resides solely and completely with the
       sender.