Yes, I think Dr Edith Fiore does things that way. Check out "The Unquiet Dead" ISBN 0-345-35083-9.
Hypnotising people tends to "open people up" psychically so in effect the hypnotised subject acts as a medium for the "earthbound entities".
There is no guarantee however that the entities who are moved on aren't going to be replaced by others. A better approach is to have a medium help out. Preferably one that works in the area of spirit rescues. One can learn about mediumship in the alt.religion.spiritualism newsgroup.
Regards, John.
I've talked to 2 hypnotist who clam they can do spirt/entity releasment. has any body heard of or tried it?