STATUS mesage problem

[Antonio Fernandez-Vicenti <afvaiv@xxxxxxxxxxxxxx>]

Problem: OPNQRYF  will send Status a message telling how many records it 
is reading and selecting...
I want to send, instead, my own message of  'Please, wait...'

Searching thru the archives I came to one that explained how to avoid 
OPNQRYF message, by issuing a
  CHGJOB STSMSG(*NONE)

My test program looks like :

   PGM                                                       
       SNDPGMMSG  MSGID(CPF9898) MSGF(QCPFMSG)                  +
                        MSGDTA('Please, wait...') TOPGMQ(*EXT) +
                        MSGTYPE(*STATUS)                             
A:     OVRDBF     RCM  FERNANAN/RCM SHARE(*YES)                   
       OPNQRYF    FILE((RCM)) QRYSLT('CCUST *EQ 2089')           

B:     CHGJOB     STSMSG(*NONE)                                  

       CALL       PRUSTSMSGR       <--- RPG pgm that will process data 
                           
       CLOF       OPNID(RCM)                                     

C:     CHGJOB     STSMSG(*NORMAL)                                
   ENDPGM                                                    


So, I'm trying to send my "Please wait..." message, then do the OPNQRYF

   * If I leave the B-tag line as shown, then NO-status messages,
     neither mine, nor OPNQRY's, will be shown. This seems normal,
     although not what I want, of course.

   * If I remove that same line, then my message shows for a moment,
     then OPNQRYF's message overlaps mine. Normal also...

But

   * In this same case, even if I move my own SNPPGMMSG just before the
     RPG program, i.e. below the OPNQRYF line, the same happens (my
     message shows first for a moment, then OPNQRYF's message) since (I
     guess) the real Open of the OPNQRYF does not take place really
     until RPG really opens it.

So, the question is, hown can I "replace" OPNQRYF's status message with 
my own message?

TIA