Hi guys . any help with this would be much appreciated

I am using showeditor 2009 to projest Text with my CS400Rgy
Its for a friends wedding and basically I need to show a message on a wall at the reception
Firstly whats the best way to do this?
and secondly I have managed to get a small sentence running but the scanning speed is much too fast and its nearly impossible to read it.
I am new here so any info is much appreciated
Thanks
Rusty