AutoCAD 2010 :: How To Change Existing Text Object Style Using Script

I've wrriten a script that will create custom annotative scales and a new text style.  (It works fine up to that point) The next steps I'm trying to add to the script is to select a text object, set it to the new style, make it annotative and add all of the annotative scales to that text object.  CHPROP allows me to make the text object annotaive but I haven't found a command that will let me change the style or add annotative scales to the text object.  Any commands I can use in a script to do this ? (or know if this is even possible)?  I have 2000+ drawings I need to run this one, I hope I can find the commands to script this with.