Resizing and Repositioning, 100% Flash Page

I feel like I’m approaching this wrong. Every time I create a new MovieClip. I have to go into my resize listener function and type in

newmc._x = Stage.height/2;
newmc._width = Stage.width;

etc… or something like that depending on where I want it positioned.

Is there a simpler method or is this the only way if I want to keep everything positioned nicely if someone decides to resize the browser.