using a SMIL file

Hi,
I am doing dynamic streaming using a flash media server.
Currently everything works fine with one video.

I now want to have different videos load when buttons are clicked.
I want to put the file list for each video in its own SMIL file.

How do I then have the SMIL file load and play the video when a button is clicked.

Currently I just have this right in my code for the one video, I have trimmed the code down to the basics

PHP Code:

---


var _ds:DynamicStream;
var videoToPlay:String;
var nc:NetConnection = new NetConnection();
nc.connect("rtmp://myServer");
nc.addEventListener(NetStatusEvent.NET_STATUS, onStatus);

function createNetstream (){
    _ds = new DynamicStream( nc );
    _ds.addEventListener( NetStatusEvent.NET_STATUS, onStatus );
    _ds.client = this;
    video.attachNetStream( _ds );
    playVideo();
}

function playVideo():void
{
        _ds.startPlay( dsi );
    }

function onStatus(e:Object):void
{
    trace(e.info.code);
    if(e.info.code == "NetConnection.Connect.Success")
    { 
        createNetstream();
    }

var dsi:DynamicStreamItem = new DynamicStreamItem();

    dsi.addStream( "mp4:GeneralReel_512x375_BR300_CBR_A96_Prog_1KFPS.f4v", 300 );
    dsi.addStream( "mp4:GeneralReel_512x375_BR600_CBR_A96_Prog_1KFPS.f4v", 600 );
    dsi.addStream( "mp4:GeneralReel_512x375_BR1000_CBR_A96_Prog_1KFPS.f4v", 1000 );
    dsi.addStream( "mp4:GeneralReel_512x375_BR1500_CBR_A96_Prog_1KFPS.f4v", 1500 );
    dsi.startRate = 300; 


---

thanks
Mark