She can read short scripts that can be found in any number of guided imagery books – by Julie Lusk, Andrew Schwartz, Ellen Curran or me - and then close her eyes and imagine them; or she could work with Bernie Siegel's or Carl Simonton's video affirmations, where there are beautiful videotaped scenes with affirmations written out and scrolled at the bottom of the screen... or Jim Porter's amazing videotaped nature scenes (I think his work is particularly gorgeous and soothing, because of the way his camera lingers on close-ups) – all of these will do the same thing as imagery (or close) with just gorgeous, meditative visual cues. So this is one possibility, if her attention span allows it. (Keep in mind that a lot of people with ADD or ADHD – kids or adults – who cannot maintain attention for left-brain, cognitive topics, will do just fine with right-brain assignments, like guided imagery.)
Another possibility would be to introduce her to energy work – the gentler versions to start, like Reiki, Healing Touch, Therapeutic Touch or Zero Balancing to learn self-soothing kinesthetically, through her skin.
And finally, some of the new tapping techniques – EFT, TFT and the like, such as what you might find on Mary Sise’s DVD or through a local practitioner could be just the thing to help her break through.
(It is also true that hearing-impaired people can do well with guided imagery and music in a group setting, unlikely as this may seem. They are able to energetically absorb the soothing effects from others, just by sitting among a densely packed group, all listening to the same thing. And you can also try an old Stan Grof trick, which is to play the music on big speakers and have the person lay on the floor and feel the vibrations through the floor.)
I hope this helps.