Two actionscript questions

programming flash
1
  1. If I want to keep all my actionscript in frame 1 of the main timeline, and I drag a movie clip (called Tent_main) onto the stage and give it the instance name tm, how can I set the depth without having to going into the movieclips timeline? I hope that makes sense- I’d just like to keep all the actionscript in one place, because I’m already easily confused.
  2. Is there a way to fix this code so it doesn’t overlap everything in the movie. I’ve tried different depths and “getNextHighestDepth” an nothing works. Here is the code (which I didn’t write… I can’t remember where I got it:()
var numStars:Number = 500;
this.createEmptyMovieClip("starField_mc", 1);
var dice:Number;
for (i=1; i<=numStars; i++) {
    _root.starField_mc.attachMovie("star", "star"+i, i, {_x:Math.random()*Stage.width, _y:Math.random()*Stage.height, _alpha:Math.random()*100});
    _root.starField_mc["star"+i].tranSpeed = Math.round(Math.random()*10+5);
    _root.starField_mc["star"+i].onEnterFrame = function() {
        twinkle(this);
        if (this.tranDir == 0) {
            this._alpha += this.tranSpeed;
            if (this._alpha>100) {
                this.tranDir = 1;
            }
        } else {
            this._alpha -= this.tranSpeed;
            if (this._alpha<60) {
                this.tranDir = 0;
            }
        }
    };
}
function twinkle(clip) {
    //roll a dice 1-500
    //1 in 500 chance of twinkling
    dice = Math.round(Math.random()*500);
    if (dice == 1) {
        clip.play();
    }
}

I’m just learnig so any help would be great!