Try Syn Alia bridge and Target training rather than clicker, IMO more effective and you don't have the negative consequences of hand feeding involved. Rena posts here and is a Syn Alia coach I believe http://www.dreamhorsetraining.com http://www.synalia.com/
Also Brigid, Epona-Girl does clicker training and could teach a person how to do it in a correct and respectful manner http://www.brigid.clickryder.com