I haven't been able to do this yet, but that doesn't mean I can't...so I'll ask here. Is there a way for a movie to read if there's been a keyframe in the timeline?

I have several images that I wish to progress through, and I'm trying to get it so that you just have to make a keyframe in the timeline where you want it to change...this being an effort at making it, ah, "accessible" by those not necessarily enormously familiar with Flash in a production environment. If that's not possible, that's fine. I'll just do something else.

Does anyone know if this is possible?