I tried to AP with binaural beats just now and I almost did it...
I felt the vibrations and then I concentrated on floating out of my body. I felt my astral body trying to pull itself out of my physical body. But I messed up. I opened my eyes, I guess my unconcious self got scared -.-'
I can't wait to try it again. I never thought I'd even get the vibrations going.
Let the vibrations flow through your body nothing can hurt you plus you could try the rope technique. When your relaxed and feel vibrations through your different charkras then imagine your climbing a rope to get out your body.
Honestly, that's what my problem with projection was. Not entirely sure of it was Etheral or Astral projection, but I remember going through a portal almost all of the way. I was excited and scared, so I left one arm out and never completely went in.