I tried tracing it out with the code you provided, and got the following message:
Error opening URL 'file:///C|/Documents%20and%20Settings/admin/Desktop/imagesxml/stuff.html'
- which I found a little wierd, because the HTML file is definately in the correct folder (Same folder with the flash files)..
I have had some limited success by changing my code from:
myText.text = about;
to:
contentMain.myText.text = about;
With this, the images from my html file are now displaying in the textArea, but the text itself is still not displaying.. I don't know why this would be happening