I'm doing a movie for my son's class... it's basically a combination of pictures and video with music over the top. 

I'm pretty much done with the entire project, and now I'm trying to add one of the canned intros that you can choose from.  When I do, it pushes the videos and photos back, but the music track stays in the same place.

Is there a way to insert photos or video in such a way that it shifts the photos, videos and the music to compensate?