Working with the 4 corners of the screen/Centering movieclip on the stage

Hello,

**1) Does anyone know how to put 4 movieclips in the 4 corners of the screen? **

This is a clear example of what I want to do: http://www.thefwa.com/
As you can see, the “Featured” menu is always at the right side of the screen and the stage is set to 100% width and height.

For e.g, with the

stage.align = StageAlign.BOTTOM_LEFT;

I can’t see my movieclip at the bottom left corner of the screen, it simply stays near the bottom left.

I have already a stage class that sets my bitmap background to fullscreen, the problem is that I can’t work right with the movieclips.

2) My second problem is how to center a movieclip ?

mc.x = ((stage.stageWidth / 2) - (mc.width / 2));

Is this supposed to work ?

Thanks in advance.