if anyones interested in a more philosophical approach to this subject (which although I find interesting i don't currently have time to give my full thoughts) the following book is worth a flick through

Danah Zohar; The Quantum Self, ISBN 0-00-654426-6

to quote the blurb on the back of the book

'... demonstrates how developments in modern subatomic physics demand a radical reappraisal of our conventional model of personality'