Buttons and Embedded text

Hi,

I learned how to make a custom scrollbar here :http://www.kirupa.com/developer/flash8/scrollbar.htm

Then, I learned how to make the text dynamic, by embedding the text.
http://www.kirupa.com/developer/mx2004/maskfonts.htm

But, what I need to do is have a button that changes what the text in the dynamic text box is. But, because the text is embedded, it won’t let me do that. How can I have it so that the dynamic text box has embedded text, and yet I can change the text in the box on the fly with the button?

This is really perplexing me, thanks for your help.

–Thanks,