Installation:

Pre-requisites:

Requires MRC to be installed on the BBS

Instructions

Copy the script (.bat for Windows or .sh for Linux) and the .conf (linux only) to your theme's scripts folder i.e.

Windows: C:\MYSTIC\THEMES\DEFAULT\SCRIPTS 
  Linux: /mystic/themes/default/scripts

Then in Mystic CFG utility add a new item in the prelogin menu;

For Windows:

   Command: (DD) Exec external program
      Data: C:\MYSTIC\THEMES\DEFAULT\SCRIPTS\ml-mrcannounce.bat %U
    Access: !OI
Grid Event: Selected

For Linux:

   Command: (DD) Exec external program
      Data: /mystic/themes/defaut/scripts/ml-mrcannounce.sh %U
    Access: !OI
Grid Event: Selected

I set "Access" to !OI so that if the user signing in has the option for invisible login available, and they choose to be invisible, it will not run the script.

That's all folks! Enjoy. =)