Help with duplicate movie clips

Howdy. I have just completed this tutorial : http://www.kirupa.com/developer/mx/snow2.htm and I have the snow reversed to go up instead of down (in my case they are balloons) I was wondering, I have the event on say frame 6 of my flash file) but when I jump to the next scene (yes I used scenes I know deprecation issues) the duplicate movie clips keep going. I have tried

removeMovieClip(“snow”);

in the actions layer on the main timeline, but the (in my case) balloons just keep rising. How do I remove the duplicated movie clips created using this code:

for (k=0; k<7; k++) {
duplicateMovieClip(this.snow, “snow”+k, k);
}

Earlier in the timeline.
Sorry if this is a basic question but I am tearing y hair out here…I am a bit of a dunce when it comes to invoking AS on timeline frames.
Basically the balloons form part of a preloading sequence I want to end when time has passed or a user presses a skip button. The premise is that the skip button and the timer (built into another movieclip) take the flash file to a frame, which attempts to unload all copies of that movieclip.

Thanks

Roosterboy