Depending on how large your sound file is one way to do it is to put the sound in its own movie clip (streaming instead of event)then control that clip with "tell target" instead of the just the sound..

Then you wouldnt need to stop all sounds..just manipulate that clip with the sound on it..

You could even resume the sound where you left off...

If the sound is huge...Youd probably want someone else here to help you out with some action script..(attach sound functions and whatnot).

Hope this helps