Change a SWF loader to a MovieClip loader (Flash / AS3)

import caurina.transitions.Tweener;
 
 
//store the buttons in as an object for later use/reference.
var btn:Object;
var disabledBtn:Object;
//The currentPage / nextPage variable holds the movieclips we will load.
var currentPage:* = null;
var nextPage:* = null;
 
//the MovieClip
var movieClipHolder:MovieClip;
 
//the ClassReference
var ClassReference:Class;
 
//first we'll reference to all the buttons on the stage
var buttons:Array = new Array (b1, b2, b3, b4, b5, b6);
//this array holds all the names we want to use for our buttons
var button_name:Array = new Array ("Home", "About Us", "Selected Work", "References", "Jobs", "Contact");
//this array stores which swf we want to load
var swf_array:Array = new Array ("swf1.swf","swf2.swf","swf3.swf","swf4.swf","swf5.swf","swf6.swf");
 
 
for (var i:String in buttons) {
	//assign the button_name array to the textclip of our buttons
	buttons[i].button_txt.txt.text = button_name[i];
	buttons[i].alpha = .25;
 
	//assign which swf we'll load for each of the buttons
	buttons[i].currentPage = swf_array[i];
	//declare that we'll use the movieclip as a button
	buttons[i].buttonMode = true;
	//make sure that the button_txt clip doesn't react to the mouse.
	buttons[i].button_txt.mouseChildren = false;
	//add the listeners for our buttons
	buttons[i].addEventListener(MouseEvent.MOUSE_OVER,onOVER);
	buttons[i].addEventListener(MouseEvent.MOUSE_OUT,onOUT);
}
 
function onOVER(event:MouseEvent):void {
	btn = event.currentTarget;
	//here we tween to the over color we've assigned earlier on with the variables.
	Tweener.addTween(btn, {alpha:1, time: 1});
	disableBtn(btn);
}
function onOUT(event:MouseEvent):void {
	btn = event.currentTarget;
	//TweenMax.to(btn , speed , {tint:colourOut, ease:motion});
	Tweener.addTween(btn, {alpha:.25, time: 1});
}
 
function disableBtn(btn:Object):void {
	// get reference to the class generated from the movieclip in library	
	ClassReference = getDefinitionByName(btn.currentPage) as Class;
	//Create a new instance of the movieclip
	movieClipHolder = new ClassReference();
	// start doing some tweening
	isLoaded();
	//addChild(movieClipHolder);
}
 
function isLoaded():void {
	//The loader now contains the page we are going to display later on.
	nextPage = movieClipHolder;
	//check if there is a currentPage
	if (currentPage != null) {
		//tween the alpha to zero
		Tweener.addTween(currentPage, {alpha:0, time: .3, onComplete: currentPageOut});
 
	} else {
		//if there is no currentPage we'll trigger the showNextPage function.
		doNextPage();
	}
}
 
function doNextPage():void {
	//position the loaderclip as nextPage
	nextPage.x = 238.0;
	nextPage.y = 0;
	//Tween the alpha to from 0 to 1
	Tweener.addTween(currentPage, {alpha:1, time: .3});
	//Add the next page to the stage
	addChild(nextPage);
	//Next page is now our current page,confusing? it isn't. We replace the next page with our current one.
	currentPage = nextPage;
 
 
}
//Once the animation is completed we'll trigger this function
function currentPageOut():void {
	//Remove the current page completely from the stage
	removeChild(currentPage);
	//Let's show the next page
	doNextPage();
}
//don't place a stop command because we will directly land on frame 2.
 
stop();

                                              

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