Pause FLVPlayback buffering? - how?

Ok, so I have an FLVPlayback playing a movie, let’s call it MainMovie. At some points during MainMovie, the user is able to open a popup on top of MainMovie which contains a smaller movie. However, this movie will sometimes take forever to load because MainMovie is still buffering in the background?

Is there a way to pause MainMovie’s buffering (and restarting it again later when the small movie is closed down again)?