falling err rather blowing snow

[walkities]

Fooling around with the kirupa falling snow 2.0 script and understand it for the most part but am trying to figure out how I would go about changing it from up down to right to left as Im looking more for a moving effect.

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;
    }
} 

Thats what I have been using, Ive fooled around with the negative/positive values with no luck. Maybe its just late and Im tired but could someone possible point me in the right direction that would help change it so it would move from the right to left?

[Sir Yendor]

Drag an instance of the Snow MC onto your stage. Click it to select it and rotate it 90 degrees. Do a test Movie to see how the snow falls it shouold either fall left ot right, or right to left. Now position the MC so the snow falls where you want it to.

[walkities]

Had tried that before with no luck the snow falls from top to bottom no matter how often I rotate the movie clip.