Changing Text Attributes when using XML

Hi,
I am using a slideshow gallery using XML. I have thumbnails which scroll and when you click on them you see the larger image

Here is a piece from my XML document –
<image thumb_url=“thumb1.jpg” full_url=“big1.jpg” title=“Celebrations” />

Is there any way to format the text within the XML document so that I can customize the color, size, font, etc. ?

Or to do it within the flash document?
Any help on this is very much appreciated!
Thanks