Disable multiple audio playing in swf

I need this player modified so that you cannot play multiple audios at the same time. open up [login to view URL] ( attached ). Currently, you can play all the audios at the same time. I need this modified so when one is playing, it pauses all that is playing ( if any ). I have attached the source code here and the swf files. I would like to pass a flashvar simultaneous if simultaneous=no, then you can only play one at a time. If null or yes then it will work as it is now. Here is the source code and swf files <[login to view URL]>