The free file is named Keyholder Binding, and it is available here:
http://www.esuccubus.com/content/keyholders-binding
Check out the website FAQ if you are new to hypnosis, and you should be good to go.
If the file works for you, you could release yourself for exercise, and then your subconscious will keep you from cheating. Your keyholder could also order you back into the belt via text or email after your session.
It can work, but whether it satisfies the needs of your KH is the more relevant question.
MP