Different fonts in "scrolling dynamically loaded text"

Thanks for the tute on dynamically loading text.
Is there any way to alter the fonts and font sizes WITHIN the bulk of text?
ie. If I wanted to have a header in one font, and the rest of the text in another.
OR
if I wanted to add a url hyperlink.
I did a site for a friend, and used the dynamically loaded textboxes so he could update it himself by just changing the .txt file.
At the moment all the scrolling textboxes are in one font. I would love to be able to change this, and even more, would love for my friend himself to be able to mix different fonts and update it himself.
Is any of this possible, or will this method ONLY let you use the one font and size of the dynamic text box.
Any help much appreciated.