I have attended one of Steven Greer's CSETI Training (costs almost $1K now).
A lot of people work for/with Steven. Some play the part as his friends/team who has been with him throughout the years "witnessing" and "collaborating" on his stories. Others act as students who have "visions"/"dreams" or who "saw" UFOs and ETs. These people tend to be doctors, nurses or people with trustworthy professions to make them more credible.
Steven claims that he has achieved cosmic consciousness and have supernatural powers, but he is flesh and bone as normal as anyone can be in person. I have to say that he can really act and he tells very compelling made-up stories.
Steven's technique of meditation is very odd. He teaches students to imagine things rather than to blank out their mind during meditation. His meditation CD features him talking about himself seeing the stars and planets and how they sing to him in a symphony.
Many good people believe this act.
He also wants people to invest and volunteer in his free energy organization.