Swf controlling other swfs in the same PC

I’m trying to make 4 individual swf “music scores” and 1 main SCORE swf that controls the others as if it was a conductor or director. For this first attempt the files are all in 1 PC, there’s no need for network interaction. And all the files are “waiting commands” or opened on screen. Is there a way to do this?

For example if i want to make the swf 3 music score jump to, say, frame 140, from clicking on a button in main SCORE swf.

Any ideas, or references i should be reading?

Thanks in advance.