While we haven't done any formal training, I have worked with Duckie on developing relaxation and self-soothing tehniques. The result is that she seems to be much more in control of her state of mind. It's made a big difference for us. She's gone from a raging, screaming & negative child to a child who tolerates two shots a week. She hasn't thrown a book or toy in months. She actually asks for help when feeling stressed instead of just acting out.
I believe these improvements are due to starting to get a handle on her complex allergies as well as teaching her to cope. The last few mobths have truly been the best we've had since she was born.