RSI for longer than 3 months is no longer a physical issue but a mind-body one. He should read up on Dr. Sarno's work. I cured my RSI in a matter of weeks, after close to half a year of anguish.
http://aaroniba.net/articles/tmp/how-i-cured-my-rsi-pain.htm...
I agree that while the symptoms of RSI may be physical, the root cause is psychological.