AS3 addChild to array generated menu

I’m familiar with AS2 and just getting started with AS3. I found a submenu fla I would like to use, and I have everything set up, just not sure how to attach movies from the library when someone clicks a navigation button.
In AS2 I would have made an empty mc and used attachMovie when the button is released.

I’ve looked at some of the addChild questions and tutorials here, but since I’m working with pre-written code for a submenu, I’m not sure about how to modify what I’ve read to work in that code.

Here’s the code that sets up the submenu, the last function (navigate) is where I’m not sure how to instruct flash to load an mc when one of the buttons (from the var subButton:Array) is clicked.
The MCs in the library correspond to the array entries ie: s.home has a library item mcHome, s.web has library item mcWeb that would load when they click that button…

var s = this.services.subBar //create a variable to shorten the path to the buttons in the sub bar
var subButtons:Array = new Array(s.home, s.it, s.web, s.graphic, s.contact); // create an array with all the buttons in the sub bar

for (var i:int = 0; i< subButtons.length; i++) // create a for loop to add the CLICK event listener to all the buttons in the sub bar at once
{
subButtons*.addEventListener(MouseEvent.CLICK, navigate); // add the click event to all the buttons
}
function navigate(e:MouseEvent):void // create your click function
{
trace(e.target.name); // this is just a trace to make sure the buttons on the submenu are working
// all navigation for the sub bars buttons goes inside this function.
text_txt.text = e.target.name; //this is another test to make sure the buttons are working
}

Any insight would be appreciated, and I think will open up the possibilities for me to use AS3 in the future. Thanks!