Presenter '09 - add/edit slides after published
I need to add some slides to all of our published articulates. I know that I need to do this to the original PowerPoints, I have those, but I don't want to mess up the audio that has already been done. How do I add slides, and keep the audio that has been previously recorded? I want to add 2 slides at the beginning, a slide before and after the quiz if applicable. And a new slide at the end, all narrated. I've been searching for a couple days now, but my search isn't working.
Also, how do I add already narrated slides to a previously narrated course? So, I am combining 2 published articulates basically.