If you can get a roundpen, I think this will help your issue alot. I've really, really grown on round pen use during the past year. In one week, you could have the horse respecting you more than you ever imagined. Lately, we've been using a round pen for everything from building respect to picking up the rear legs. Its also just a great time to get to know your horse. Sometimes I just bring my mare up the and hang out with her. As I get to know her more and more, she stays closer and closer to me. I feel good knowing that she doesn't just do that because I make her, but because she respects me as her "leader".
Anyways, I'm sort of going off topic, but it relates too. A round pen is easier to train in because there are no corners for your horse to get stuck in. I would say hold off on teaching any tricks until you can touch just about every part of her body. The main reason I say this is because with a lot of tricks you have to get closer to the horse, and if she's jumpy, she could injure you. I would also stay away from any tricks that ask a horse to lift its legs in any way. However, when you are teaching her to pick up her feet for you to clean, it would not be a bad idea to teach her the command "up". Our horses know that "up" means we want them to lift for the farrier or hoof cleaning.
Also, as pat mentioned, relaxation exercises like head lowering and bending are great. Head lowering is pretty easy to teach. What I've done in the past is put pressure downwards on the head with the halter and a lead. As soon as she gives in, release the pressure. That is her reward. She should pick it up fairly quick, but it may take a bit to get her to understand. As for the bending of the neck, we teach our horses to do this because it is very relaxing for them, and helps to build up neck muscles. We bend for a few seconds on each side fo the neck after mounting. It just sort of sets the mood.
Other things you can work on right now is backing up and walking nicely on a lead. Get her to walk with you and not in front of you. Also, desensitizing is great too. Just make sure big enough area (We use our roundpen) and that you have control of the stimulus. Plastic bags, tarps, big exercise balls (Not horse balls, those can be dangerous for the horse becuase they can actually get them stuck under their bellies), and anything else is great. Throws things at them, around them, make noises, whatever. If something spooks her, do it until she's relaxed and licking her lips. Our horse now love to play with the exercise balls and we can kick them at them and they will kick them back. Just another fun thing to build trust and to have fun!
I know its tough with a spooky horse like that, but you'll get there if you're patient. Sometimes you have to use food on a very spooky animal just to get them handable, but after that it should be more about respect. Seems like you are making progress though. Good luck!