_x and _y of kirupa's falling snow

Hi, I have a question regarding Kirupa’s magnificent falling snow.

I have a flash search interface and I want the snow only to fall over one part of it – when I specify the movieWidth and movieHeight, it predictably falls in the upper left corner.

How can I get it so that it falls on the right side of the stage? How do I specify the _x and _y of the clip?

Thank you!

L