I don't know what you are trying to do.
Just to be clear: SwordSearcher supports audio Bibles. There is no support for audio commentaries.
What you
can do is create your own commentary, and with some HTML editing knowledge you can link audio files from the user commentary like you would link any other file in an HTML document. They would just open in your media player. This could be done to link sermons, etc.
But there is no direct support for this. You'll need to directly edit your commentary's HTML code and insert fully-qualified file:// links to accomplish this.