Action scripted layers always act as top layers?

I used this snow effect from kirupa…
<A href=“http://[[color=#003366]http://www.kirupa.com/developer/mx/snow.htm](/” target=_blank>[url="http://http://www.kirupa.com/developer/mx/snow.htm)[/color]
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[color=#003366]However, the snow effect always acts like the top layer, ok what i mean is, i have 3 layers, (1)toplayer= a car, (2)middle= snow, (3)low= background.[/color]
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[color=#003366]I want to make the snow to be seen behind the car…i hope you understand what i mean :-/, whenever i put the code from the link above it acts as the top layer and appears in front of everything.[/color]
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[color=#003366]Any help is appreciated…[/color]