Yes, I have had some success with Cranial Osteopathy, but agree with Maria that there are serious food issues, as well and feel that both these issues need addressing to achieve maximum potential.
The Sutherland Society is the largest UK cranial osteopathy organisation -
http://www.cranial.org.uk/
One day I'll get around to registering with them -
On the Allergy & Food issue there's research on the main US NAET site, but no direct link to page. If you go here - http://www.naet.com/subscribers/ - click on Research button, you'll see some stats for ADHD. Then if you click on the BLue arrow for more Research you'll find stats for Anxiety and Autistic Spectrum Disorders.
I've not had the fortune to treat any children with dyspraxia with NAET yet, so cannot speak from personal experience on that one, but have helped kids with various other allergy related problems.
Andrew.