index page with headline of message body

Dear all

  I want to know how to configure MHonArc to include 
the headline of mail body in  the index page.

For example I want to show an Main Index file like

=====
*From: Dcrocker  
 Subject: nned  
 headline:Last week I asked some of

*From: dcrocker  
 Subject: message id format  
 headline: I recommend

=====

just like "scan" command of MH.


Any help will be welcom. Thanks in advance.
----------  
       Taku Izubuchi   High Energy Physics Theory Group
       izubuchi(_at_)het(_dot_)ph(_dot_)tsukuba(_dot_)ac(_dot_)jp              
       Dept. physics                              
       Tsukuba University                         
       Tenoudai Tsukuba Ibaraki 305 Japan.        
       Telephone: +81 298-53-4284
       facsimile: +81 298-53-4492