It`s been here alrerady ... still

I know I should reposotion the contentHolder mc when the content is loaded.

I`d do this with this script here:

	contentHolder._x = Stage.width/2 - (contentHolder._width / 2);
	contentHolder._y = Stage.height/2 - (contentHolder._height / 2);

I placed the function on almost possible spot in the FLA, but I can`t figure it out. Also I tried to call the relocate function from the loaded content .swf.

I`m using this gallery script:

onClipEvent (load) {
	function executeAction(action) 
	{
		//loadMovie(action, _parent.contentHolder);
		//_root.createEmptyMovieClip("leer", this.getNextHighestDepth());

		//loadMovie("leer", contentHolder);
		mc.changeAlpha(0, false, action);
		
		// 
		// Uncomment the above line to get the menu working
		// and add a content mc on the stage (with the instance name "content") to
		// load in your stuff (swf's, jpg's, etc).
		// 
	}
	
	MovieClip.prototype.changeAlpha = function(alphaTo, theLoader, action)
	{
		this.onEnterFrame = function()
		{
			if(this._alpha > alphaTo)
			{
				this._alpha -= 10;
				if(this._alpha <= alphaTo)
				{
					if(!theLoader)preload(action);
					delete this.onEnterFrame;
				}
			}
			else if(this._alpha < alphaTo)
			{
				this._alpha += 10;
				if(this._alpha >= alphaTo) delete this.onEnterFrame;
			}
		}
	}
	
	function preload(thePath)
	{
		
		mc.loadMovie(thePath);
		_parent.attachMovie("loader", "loader", 101);
		_parent.loader._x = 390;//loader x position
		_parent.loader._y = 270;//loader y position
		this._parent.onEnterFrame = function()
		{
			l = Math.round(mc.getBytesLoaded());	
			t = Math.round(mc.getBytesTotal());
			getPercent = l/t;
			trace (t);
			trace (l);
			//this._parent.loader.loadText = Math.round(getPercent*100)+"%";
			if (l>0 && l>=t)
			{
				_parent.loader.changeAlpha(0, true);
				mc.changeAlpha(100);
	    		delete this.onEnterFrame;
			}
		}
	}
	
	function selectItem(item) {
		if (this[item].action != null && curItem != item) {
			executeAction(this[item].action);
		}
		if (this[item].sub == false || curItem == item) {
			curItem = null;
			removeSub();
		} else {
			curItem = item;
			buildSub(item);
		}
	}
	function buildSub(item) {
		var i;
		var s;
		var j;
		var d = 0;
		this.attachMovie("subholder", "subholder", 100);
		var k = this.subholder;
		var total_subs = 0;
		var correct_item = (Number_Items-item)+1;
		for (i in menuObj["item"+correct_item]) {
			if (typeof (menuObj["item"+correct_item]) == "object" && i != "sub" && i != "action") {
				total_subs++;
			}
		}
		var Present_sub = total_subs-1;
		for (i=1; i<total_subs; i++) {
			k.attachMovie("sub", i, d);
			s = k*;
			s.name = menuObj["item"+correct_item]["sub"+Present_sub].name;
			s.action = menuObj["item"+correct_item]["sub"+Present_sub].action;
			s._x = 20;
			s._y = (s._height+subSpacer)*d;
			d++;
			Present_sub--;
		}
		k._y = this[item].basey+this[item]._height+menuSpacer;
		var u = 1;
		for (i in menuObj) {
			j = this[u];
			if (this[item]._y<j._y) {
				j.target = j.basey+k._height+menuSpacer;
			} else {
				j.target = j.basey;
			}
			u++;
		}
		subs = total_subs;
		onenterframe = menuAnimation;
	}
	function removeSub() {
		this.subholder.removeMovieClip();
		depth = 1;
		for (i in menuObj) {
			this[depth].target = this[depth].basey;
			depth++;
		}
		onenterframe = menuAnimation;
	}
	function menuAnimation() {
		var i;
		var j;
		var k = true;
		var depth = 1;
		for (i in menuObj) {
			j = this[depth];
			j._y = j._y+(j.target-j._y)/menuSpeed;
			if (menuTolerance<Math.abs(j.target-j._y)) {
				k = false;
			} else {
				j._y = j.target;
			}
			depth++;
		}
		if (k) {
			onenterframe = null;
			if (curItem != null) {
				activateSub();
			}
		}
	}
	function activateSub() {
		var d = 0;
		for (i=1; i<subs; i++) {
			subholder*.start = getTimer();
			subholder*.delay = subDelay*d;
			subholder*.gotoAndPlay(2);
			d++;
		}
	}
	MovieClip.prototype.activateMenu = function() {
		var d = 0;
		for (i=1; i<Number_Items+1; i++) {
			this*.start = getTimer();
			this*.delay = itemDelay*d;
			this*.gotoAndPlay(3);
			d++;

		}
	};
	mc = _parent.contentHolder;
	var menuSpacer = 1;
	// sets the vertical space between main items
	var subSpacer = 1;
	// sets the vertical space between sub items
	var menuSpeed = 5;
	// sets the menu animation speed
	var menuTolerance = 1;
	var subDelay = 170;
	// set the delay for the sub items entering the stage
	var itemDelay = 100;
	// set the delay for the main items entering the stage
	var curItem = null;
	var menuObj = _parent.menuObj;
	var onenterframe = null;
	var Present_item = Number_Items;
	var loop_condition = Number_Items+1;
	for (d=1; d<loop_condition; d++) {
		this.attachMovie("item", d, d);
		k = this[d];
		k._x = 20;
		k._y = (k._height+menuSpacer)*d;
		k.name = menuObj["item"+Present_item].name;
		k.action = menuObj["item"+Present_item].action;
		k.sub = menuObj["item"+Present_item].sub;
		k.basey = k._y;
		if (k.sub == false) {
			k.icon._visible = false;
		}
		Present_item--;
	}
	activateMenu();
	//this._parent.contentHolder._alpha = 100;

}
onClipEvent (enterFrame) {
	onenterframe();
}

helping to find the right line to insert the center function is greatly appreciated. thx,
m.