Well like I mentioned earlier, at least look into Clinton Anderson, John Lyons, and Pat Parelli. I think you can even rent some of those videos in the library. Also, Anderson and Lyons have had articles in Horse and Rider magazine, which you could also probably read at the library, that talk a lot about how to work with your horses and build confidence and trust between you, which may be all you need to to do prevent her rearing. You are fearful, she knows how to get to you, and she uses it to avoid being ridden. i just think going back to basics with her may help her learn to trust you and maybe you can work through the difficulties by doing so, which is why I suggested it before. It's more about building a relationship between the two of you than it is about actually going back to teaching her groundwork.

Hope it all works out for you. Training or retraining adult horses can be very hard sometimes, since they don't come as a clean slate like a foal, and since you have some experience there, it may come in handy in retrainnig her as well. Good luck with that.