Put AS created movie inside movie clip

I have used ActionScript to create a movie which contains a text field (that imports XML) and a UIScrollBar. I’d like to fade the text in but it won’t work because the fade script (alex_uhlmann) requires the initial alpha to be set to 0 and since there is no physical clip on stage, doing this - text_mc._alpha = 0; - doesn’t work.

So if I can put text_mc inside a clip on stage (with alpha at 0) I can fade it. How can I get the text_mc inside content_mc with ActionScritp?