Hi..
Have you tried Hemi-Sync?. They have some cd's to handle ADD/ADHD.. Have never tried them for that, but to focus, concentration etc. their cd's are really good.. They are using binaural beats, in a certain way like holosync.. to harmonize both sides of the brain and a lot of other applications..stuff like that..
http://www.hemi-sync.com/
Murof.
