The AS3 documentation for the <img> tag in htmlText says:
So you can stick images from your library in html textFields... the question is how?src: Specifies the URL to an image or SWF file, or the linkage identifier for a movie clip symbol in the library. This attribute is required; all other attributes are optional. External files (JPEG, GIF, PNG, and SWF files) do not show until they are downloaded completely.
I've got this lovely flash interface that's going on a CD-Rom. It's entirely contained in one file-- and I'd rally rather not have a "resources" folder just for three lousy icons.
Does anyone have an example of how this worked, even under AS2?