Screen readers cannot "read" images. They cannot see, for example, a photo of your children playing in the park and immediately tell the blind person, "picture of 4 children playing in the park". In order for Flash Web Designer images to be meaningful to a blind person, you need to add description tags to those images.

Such description tags are called "ALT" tags in HTML parlance. I've mentioned how you can do this in my article How to Create a Search Engine Friendly Website, so you should read that article if you're not familiar with the concept.

(Note: If you use one of my web design tutorial series, like How to Create a Website with Dreamweaver CS4 or How to Design and Publish Your Website with KompoZer, and followed my suggestions, your images will probably be already tagged.)

As a side effect, putting ALT tags on your images will benefit your site not just with blind visitors, but also with the search engines, which for all practical intents and purposes, are also "blind".

There are also websites where the webmasters have obviously used an image editor to create the design and write the text content. They then dumped the entire picture as their website. The links are image maps. Even the text you see is just part of the image. Needless to say, such a site is very difficult, if not impossible, for the blind to use. To fix such a site, use a web editor to craft Flash Web Designer site, and only use images for design elements and other things that really need pictures.