Hi S.,
Like with most problems, the best way to get to the root is to remove the interference. Asperger's is different but closely associated with autism, ADD, ADHD and the like. I have a friend who has an autistic child and the upper cervical chiropractor has had a lot of good results and suggested detoxifying the house. (The school of course is a different subject) Chemicals that are used around the house contain many, many nuero-toxins. Chlorine Bleach (invented as a neuro-toxin by our military), Windex and Pledge are among the worst. My daughter had a diagnosis of ADHD and when we detoxed the house, the diagnosis vanished. I know Asperger's is serious, but you may be able to remove some very dangerous stimuli just by removing the toxins. It is possible that if the toxins were removed, the diagnosis would change or shift.
The worst thing that could happen if you did get the chemicals out of the house is that everybody feels better and you may have more energy to deal with your son.
Chiropractic by someone who is experienced with children with these types of disorders can also give you quite a bit of advice.
Good luck to you and email me if you would like to talk.
M.