Well, for starters, exorcisms can be quite volatile, and the Rite of Exorcism can only be done with a qualified, competent Catholic priest, and only then under very special and unique circumstances.
For starters, if you are truly interested in studying exorcism, one good place to start might be to pick up Fr. Malachi Martin’s book,
“Hostage to the Devil”, perhaps one of the most authoritative texts on the subject.
Fr. Gabriele Amorth, the Vatican’s Chief Exorcist, has some books he has written on the subject as well. * “An Exorcist Tells His Story”* and
“An Exorcist: More Stories” are two of his books.
“Beware the Night” is a book written by Catholic police officer, Ralph Sarchie, and is another scary read on the subject.
The actual text of the Rite of Exorcism can be found in the Roman Ritual, Volume 2, by Fr. Philip Weller:
pcpbooks.com/new_books_pages/roman_ritual.htm
During an exorcism, there is definite physical, psychological, mental, and spiritual harm that can be done to the exorcist by the demon. It is very, very dangerous if the exorcist is not properly knowledgeable and trained in this subject area.
Exorcisms are conducted in Latin – According to Fr. Amorth, the Devil hates Latin, and demons become quite agitated by pictures of Pope John Paul II:
freerepublic.com/focus/f-religion/1842528/posts
As I stated earlier, you are treading on dangerous ground. Be very, very careful.