Exibir imagens em colunas

Olá galera

Fiz este codigo, mas não consigo de nenhuma maneira fazer q ele exiba o resulado em 2 coluas.

o codigo é o seguinte

var meuXML = new XML();
meuXML.ignoreWhite = true;
meuXML.onLoad = function ()

 altura = thumb._height * meuXML.childNodes[0].childNodes.length + meuXML.childNodes[0].childNodes.length * 2;
 if (altura <= _root.rolagem._height)
 {
 _root.rolagem._visible = false;
 } // end if

 for (i = 0; i < meuXML.childNodes[0].childNodes.length; i++)
 {
 duplicateMovieClip("thumb", "thumb" + i, i + 1);
 thumbs = _root.tudo_mc["thumb" + i];
 thumbs._y = thumbs._y + (thumb._height + 2) * i;
 var MCL1 = new MovieClipLoader();
 MCL1.loadClip(meuXML.childNodes[0].childNodes[i].attributes.thumb, thumbs.mostra);
 thumbs.onEnterFrame = function ()
 {
 progresso1 = MCL1.getProgress(this.mostra);
 this.pct_thumb.text = Math.ceil(progresso1.bytesLoaded / progresso1.bytesTotal * 100) + "%";
 progresso1.bytesLoaded == progresso1.bytesTotal ? (this.pct_thumb._visible = false) : (this.pct_thumb._visible = true);
 };
 thumbs.atual = i;
 thumbs.btn.onRelease = function ()
 {
 var MCL2 = new MovieClipLoader();
 MCL2.loadClip(meuXML.childNodes[0].childNodes[this._parent.atual].attributes.medio, _root.mc);
 this.onEnterFrame = function ()
 {
 progresso2 = MCL2.getProgress(_root.mc);
 _root.pct.text = Math.round(progresso2.bytesLoaded / progresso2.bytesTotal * 100) + "%";
 progresso2.bytesLoaded == progresso2.bytesTotal ? (_root.pct._visible = false) : (_root.pct._visible = true);
 };
 var MCL3 = new MovieClipLoader();
 MCL3.loadClip(meuXML.childNodes[0].childNodes[this._parent.atual].attributes.grande, _root.mc3);
 this.onEnterFrame = function ()
 {
 progresso3 = MCL3.getProgress(_root.mc3);
 _root.pct3.text = Math.round(progresso3.bytesLoaded / progresso3.bytesTotal * 100) + "%";
 progresso3.bytesLoaded == progresso3.bytesTotal ? (_root.pct3._visible = false) : (_root.pct3._visible = true);
 };
 _root.descricao.htmlText = meuXML.childNodes[0].childNodes[this._parent.atual].childNodes;
 _root.descricao.htmlText = _root.descricao.text;
 };
 thumbs.btn.onRollOver = function ()
 {
 _root.tudo_mc["thumb" + this._parent.atual].mostra.contrastTo(50, 1);
 };
 thumbs.btn.onRollOut = function ()
 {
 _root.tudo_mc["thumb" + this._parent.atual].mostra.contrastTo(100, 1);
 };
 } // end of for
 _root.rolagem.drag.onPress = function ()
 {
 var _loc4 = this._x;
 var _loc3 = this._x;
 var _loc5 = 0;
 var ymax = this._parent.fundo._height - this._height;
 this.startDrag(false, _loc4, _loc5, _loc3, ymax);
 this.onRelease = this.onReleaseOutside = function ()
 {
 stopDrag ();
 delete this.onMouseMove();
 };
 this.onEnterFrame = function ()
 {
 _root.tudo_mc._y = _root.tudo_mc._y + (-Math.round(this._y / ymax * (altura - _root.rolagem._height)) - _root.tudo_mc._y) / 3;
 };
 };
};
meuXML.load("campanha.xml");

agradeço a ajuda