Preloading Assets

Question

Hi,
I have two questions about preloading assets using actionscript 3.0
• Is there a way to preload all assets in the library for faster view before viewing them on stage?
• I know how to preload an image using a progress bar but how can i load multiple images and show their loading progress using one progress bar?
I know that i need to caclulate the size of all the assets and then divide them somehow but im not sure how to do it...
I been trying to figure it out for a while now and i will appreciate some code examples if possible.
Thanks

Answer 1

thanks CaioToOn!
The array is working great but i still had a small issue that i had to solve and it's the bytesLoaded.
i used the line loadedBytes += event.currentTarget.bytesLoaded; and it was a mistake because it would increase
the loadedBytes every time that the progress event is called and i would get a very high number...
i tried to sort it out with creating another variable that will hold all the data and every time that one bytesLoaded is complete it will add
it to the variable and reset itself, it seems to work fine when i simulate the download but when i upload it to the server it's playing
up. the percentage goes up and down....
you can check out the link of the swf file:
http://www.eliprint.net/m2/prototype.swf
below is the revised code....(in red is the lines of code that are probably causing the problem).
if anyone have a clue about how to load multiple images and post some helpful code
or if any one have time to look into my code and find out what's wrong i will really appreciate it!
Thanks
// variables
var urlReq:Array = new Array();
var included:Array = new Array();
var images:Array = new Array();
var numOfImg:Number = 11;
var loadedBytes:Number = 0;
var totalBytes:Number = 0;
var loaded:Number = 0;
var percent:Number = 0;
import fl.controls.ProgressBarMode;
progressBar.mode=ProgressBarMode.MANUAL;
// create images array
for (var j=0; j<urlReq.length; j++){
    var loader:Loader = new Loader();
    loader.load(urlReq[j]);
    loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loadingImage);
    loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadingComplete);
// progress event
function loadingImage(event:ProgressEvent):void{
    loadedBytes = event.currentTarget.bytesLoaded;
    if (loadedBytes >= event.currentTarget.bytesTotal){
        loaded += event.currentTarget.bytesTotal;
        loadedBytes = 0;
    if (included.indexOf(event.currentTarget) == -1){
        included.push(event.currentTarget);
        totalBytes += event.currentTarget.bytesTotal;
    percent = Math.ceil((loaded+loadedBytes) * 100 / totalBytes);
    trace("PERCENT: " + percent);
    txtPercent.text = percent.toString() + "%";
    progressBar.setProgress(percent, 100);
    trace("LOADED: " + loaded);
    trace("TOTAL: " + totalBytes);
function loadingComplete(event:Event):void{