www.BinauralHealing.com has a free 20 minute Binaural Mp3 which will put you in a relaxed mental state. A relaxed state of mind is needed for meditation, astral projection, chakra tuning and so on.
This is a good first step toward experiencing Astral Projection for yourself. Learn about the Astral Plane and how it is made up of the conscious thoughts of man and so much more.