One Poster on the Graves thread said " Well, technically necromancy doesn't involve using the original soul of the body. It's either a piece of the necromancer's soul, or a spirit aligned with him/her.
Pretty much every book I've read that had Necromancy involves dragging the soul back to the Prime material plane. Of course these are Fictional works in Fantasy.
The age of technology is a fabulous thing because we can easily find information about even esoteric and odd subjects like.....Necromany. There people that say they can work magic. I've seen some pretty odd things in my life so I'm not prepared to say its impossible.
The following is an except from an alledge practitioner of "high magic". I have to admit, I don't have any scientific way to back up my assertion.
What is Necromancy? Necromancy is the practice of using the dead to get what you want. Necromancy is Death Magick. Specificly manipulating spirits to do your work for you, or rather to empower it. It is not a freindly type of magick, you will be actinf as a Bully to the spirits. The idea is to force them to do what you want, not be nice to them.