Setting depth with Snow

So I’m trying to adapt this snow script and its awesome, but how would I put it on the main timeline and swap the depth so that the snow was on a layer beneath another layer?

[COLOR=“Red”]Here’s the script on the clip:[/COLOR]
onClipEvent (load) {
//specifies the size of the movie stage
movieWidth = 300;
movieHeight = 200;

//variables that will modify the falling snow
i = 1+Math.random()*2;
k = -Math.PI+Math.random()*Math.PI;

//giving each snowflake unique characteristics
this._xscale = this._yscale=50+Math.random()*100;
this._alpha = 75+Math.random()*100;
this._x = -10+Math.random()*movieWidth;
this._y = -10+Math.random()*movieHeight;

}
onClipEvent (enterFrame) {
//putting it all together
rad += (k/180)*Math.PI;
this._x -= Math.cos(rad);
this._y += i;
if (this._y>=movieHeight) {
this._y = -5;
}
if ((this._x>=movieWidth) || (this._x<=0)) {
this._x = -10+Math.random()*movieWidth;
this._y = -5;
}
}

[COLOR=“Red”]And here’s the script on the main timeline:[/COLOR]

for (k=0; k<100; k++) {
duplicateMovieClip(_root.snow, “snow”+k, k);
}

Any help would be super appreciated.