NetStream and timer synchronization

[fauvent]

Hello guys, I’m new in as3, so if I say or if I did something stupid in my code, please bear with me!
I have been making some “application” in as3/flash for some customer… let me explain what, that application is supposed to do:
It should load a video, and as the video runs, I should be able to add some dynamic content, such as pictures and audio. I searched on internet for a similar code, but I couldn’t find anything, so the way I “solved it” is with a timer. Whenever the timer is at an specific moment the script fires or includes a file.
The problem is that the netstream and the timer never start at the same time, and that makes very difficult to add anything at the exact moment I want . Here is my code:

var param:Object = LoaderInfo(this.root.loaderInfo).parameters;
var sexo;
var nombre;
var edad;
var aptitudes;
var problemas;


sexo         = param["var1"];
nombre         = param["var2"];
edad         = param["var3"];
aptitudes     = param["var4"];
problemas     = param["var5"];


var firstName:Sound=new Sound();
firstName.load(new URLRequest("audios/"+ nombre +".mp3"));


var imageLoader:Loader = new Loader();
var pic:URLRequest = new URLRequest("nino.jpg");
imageLoader.load(pic);
imageLoader.visible = false;
imageArea.addChild(imageLoader);


var imageFirma:Loader = new Loader();
var Firma:URLRequest = new URLRequest("image.jpg");
imageFirma.load(Firma);
imageName.addChild(imageFirma);


Reproducir.visible = false;


var src     = "7.flv",
videoLoader:URLLoader = new URLLoader(),
video:Video = new Video(720, 480);
    
videoLoader.addEventListener(ProgressEvent.PROGRESS , VideoLoading);
videoLoader.addEventListener(Event.COMPLETE , VideoLoaded);


videoLoader.load(new URLRequest(src));


function VideoLoading(e:ProgressEvent):void{
    trace(e.bytesLoaded/e.bytesTotal);
    var loaded:Number = e.bytesLoaded / e.bytesTotal;
    preloader.SetProgress(loaded);
}


function VideoLoaded(e:Event):void{
    var con:NetConnection = new NetConnection();
    con.connect(null);
    var    stream:NetStream = new NetStream(con),
    meta:Object = new Object();
    
    stream.addEventListener(NetStatusEvent.NET_STATUS , StreamStatus);
    stream.bufferTime = 10;
    
    function StreamStatus(stat:Object):void{
    if(stat.info.code == "NetStream.Play.Stop")
        {
        stream.seek(0);
        }
    }
    
var t:Timer = new Timer(1000);
t.addEventListener(TimerEvent.TIMER, onTick);


function onTick(event:TimerEvent):void {
    var nsSecs:Number = Math.floor(stream.time);
        var nsMins:Number = Math.floor(nsSecs / 60);
        nsMins %= 60;
        nsSecs %= 60;
    var nsSecsDisplay:String = "";
        var nsMinsDisplay:String = "";        
    
        if (nsMins < 10){    
              nsMinsDisplay = "0" + nsMins;
        }  else {
              nsMinsDisplay = "" + nsMins;
        }
    if (nsSecs < 10){    
              nsSecsDisplay = "0" + nsSecs;
        } else {
          nsSecsDisplay = "" + nsSecs;
    }
    time_txt.text = nsMinsDisplay + ":" + nsSecsDisplay;
        
    if(nsSecsDisplay == '04' && nsMinsDisplay == "00"){
        firstName.play();
        }
        
    if(nsSecsDisplay >= '26' && nsSecsDisplay <= '30'){
        imageLoader.visible = true;
    }else{
        imageLoader.visible = false;
    }
        
}


    stream.client = meta;
    preloader.visible = false;
    Reproducir.visible = true;
    addChildAt(video, 0);
    video.attachNetStream(stream);
    
Reproducir.addEventListener(MouseEvent.CLICK, onMouseDownhandler);
function onMouseDownhandler (event:Event):void {


    Reproducir.visible = false;
    stream.play(src);
    t.start();
}
    
}

Any help will be very much appreciate! Thanks in advance!