Simpler XML question

Most of the threads about loading xml data into Flash text boxes and MCs involve menus or photo galleries. I’m trying to do something simpler (well, it’s kinda gallery-like I guess).
I have a column of 10 buttons (not dynamically generated).

Clicking on button number ones should:
a) load a jpg into an empty MC (done).
b) load a text caption into an empty text box
– no thumbnails here.

All the samples I’ve browsed have the text loading tied into figuring out which dynamically generated thumbnail is being clicked (the old i++). I just want one at a time:

on (release) {
loadMovie(“sites/preview_bh.jpg”, “previewArea/previewer”);
//load text_bh.txt or text_bh.xml into textbox (named “caption”);
}

Also, how do you use the actionscript formater for these posts?