Aligning object to stage with actionscript

I have a dynamic text box pulling info from an xml file. After the text loads the box resizes with autoSize.
Any ideas on how i can get the box to align to the center of the stage after that with actionscript??
I've looked around and can't seem to find a solid yes or no anywhere.
Or if that's impossible, is there any way to vertically align the text, which would negate the need for the resize and align.

Thanks