Welcome to the CDMS, where the game won't stop even if the message box is shown !
You can customize the message appearence, show faces, set the speed of the letter by letter system and more...
Here an example.
Of course, I made a documentation on how to use it, a demo to see scripts and a patch to apply in your level.
(Use this tool to apply : viewtopic.php?f=66&t=1723)
All those files are in this download link : https://www.mediafire.com/?6ufq6as6zpl6r1x
/!\ You need to have a very little script skills if you want to use it.