MovieClip.prototype.preload = function(image, barWidth, imgWidth, imgHeight) {
    var barWidth = barWidth == undefined ? 100 : barWidth;
    var imgWidth = imgWidth == undefined ? 0 : imgWidth;
    var imgHeight = imgHeight == undefined ? 0 : imgHeight;
    this.createEmptyMovieClip("holder_mc", 0);
    this.createEmptyMovieClip("updater_mc", 1);
    this.createEmptyMovieClip("barra_mc", 2);
    this.createEmptyMovieClip("filete_mc", 3);
    this.barra_mc._xscale = 1;
    with (this.barra_mc) {
        beginFill(0x000000, 100);
        lineTo(barWidth, 0);
        lineTo(barWidth, 1);
        lineTo(0, 1);
        lineTo(0, 0);
    }
    with (this.filete_mc) {
        //beginFill(0x000000, 100);
        lineStyle(0, 0x0000);
        lineTo(barWidth, 0);
        lineTo(barWidth, 2);
        lineTo(0, 2);
        lineTo(0, 0);
    }
    if (imgWidth != 0) {
        this.barra_mc._x = this.filete_mc._x=imgWidth/2-barWidth/2;
    }
    if (imgHeight != 0) {
        this.filete_mc._y = imgHeight/2-this.filete_mc._height/2;
        this.barra_mc._y = imgHeight/2-this.barra_mc._height/2+1;
    }
    this.holder_mc.loadMovie(image);
    this.updater_mc.onEnterFrame = function() {
        this.Loaded = this._parent.holder_mc.getBytesLoaded();
        this.Total = this._parent.holder_mc.getBytesTotal();
        this.Percent = Math.ceil((this.Loaded/this.Total)*100);
        if (this.Loaded != this.Total || this.Total<=0) {
            this.Percent = this.Total == 0 ? 0 : this.Percent;
            this._parent.barra_mc._xscale = this.Percent;
            trace(this.Percent+" %");
        } else {
            this._parent.barra_mc._xscale = this.Percent;
            if (this.holder_mc._alpha>90) {
                this.holder_mc._alpha = 100;
                delete this.onEnterFrame;
            } else {
                this.holder_mc._alpha++;
            }
            this._parent.barra_mc.removeMovieClip();
            this._parent.filete_mc.removeMovieClip();
            this.removeMovieClip();
        }
    };
};
//Uso:
//image, barWidth, imgWidth, imgHeight
holder_mc.preload("http://www.bigwalls.de/Fotos/MontBlanc/Drus.jpg?"+random(99999), 60, 200, 200);

pileUpLoader = new pileUpLoader();
function pileUpLoader() {
    this.movieArray = new Array();
}
pileUpLoader.addFile = function(filename, loadTarget) {
    this.movieArray.push({filename:filename, loadTarget:loadTarget});
};
pileUpLoader.clearStack = function() {
    this.movieArray.length = 0;
};
pileUpLoader.loadNext = function() {
    if (this.movieArray.length>0) {
        this.currentMovie = this.movieArray.shift();
        loadMovie(this.currentMovie.filename, this.currentMovie.loadTarget);
        return 1;
    } else {
        return 0;
    }
};
//Uso
pileUpLoader.addFile(filename, targetname);
pileUpLoader.loadNext();