Navigating movie clips

Question

Hi. I've basically been copying code from a series of tutorials, and now I've hit a wall because the series doesn't cover this part, and I'm certainly no expert at ActionScript.
Basically, I'm trying to handle all the navigation with movieclips instead of moving around on the timeline. What Im trying to achieve is to have a main 'page' with a couple navigation buttons. One of them (cartoonButton) would open a movieclip called cartoonBG, which is a 15 frame alpha fade-up that would end with a frame with buttons for opening cartoons (right now, there's only one cartoon, but eventually there will be more).
The problem is, as soon as the file opens, it goes into a loop, playing the cartoonBG movie clip over and over. So, I guess I need to know how to make it so that the frame is still when the clip opens, and then I can do an onRelease for cartoonButton and have that open and play cartoonBG. That's sample 1.
Sample 2 is what I have for frame 15 of cartoonBG. That would be where the alpha fade-up stops, and I want it to be set so you click episode1Button and that loads BnR1.flv into the NetStream (and, later on, when I have a second cartoon, episode2Button would load BnR2.flv and so on). That's sample 2.
Thanks so much in advance if someone could help me out!
SAMPLE 1:
stop;
cartoonButton.onRelease = cartoonBG.play;
SAMPLE 2:
stop;
var nc:NetConnection = new NetConnection();
nc.connect(null);
var ns:NetStream = new NetStream(nc);
theVideo.attachVideo(ns);
ns.play("BnR1.flv");
playButton.onRelease = function() {
    ns.pause();
var videoInterval = setInterval(videoStatus,100);
var amountLoaded:Number;
var duration:Number;
ns["onMetadata"] = function(obj) {
    duration = obj.duration;
function videoStatus() {
    amountLoaded = ns.bytesLoaded / ns.bytesTotal;
    loader.loadbar._width = amountLoaded * 475;
    loader.scrub._x = ns.time / duration * 475;
var scrubInterval;
loader.scrub.onPress = function () {
    clearInterval(videoInterval);
    scrubInterval = setInterval(scrubit,10);
    this.startDrag(false,0,this._y,461,this._y);
loader.scrub.onRelease = loader.scrub.onReleaseOutside = function() {
    clearInteral(scrubInterval);
    videoInterval = setInterval(videoStatus,100);
    this.stopDrag();
function scrubit() {
    ns.seek(Math.floor((loader.scrub._x/461)*duration));

Answer 1

That works, but I actually want it to be set up so I (or the user) could go back to cartoonBG again, as opposed to getting rid of it completely.
The way I'm setting this up is that homeButton, cartoonButton, and a couple others (extrasButton, downloadsButton) are all navigation on a footer that will always be there, but they'll bring up these different movie clips (cartoonBG, extrasBG, etc.) instead of going to other frames on the main timeline. The tutorial I was working off of seemed to think that was the way to go, and for whatever reason, I took him at his word.
Anyway, is there a different way I could code homeButton that wouldn't get rid of cartoonBG?
I should also take this opportunity to say thanks for all this help! I really do appreciate it!