There is not
necessarily a
need to take
apart the
brain to
transfer a person (
download) into a
computer.
I've actually seen a description of how it could be done.
You'd need some artificial neurons - machines that can perform all the functions of a natural biological one. You'd slowly replace all of the neurons in the brain with the new mechanical ones. Since they would have to perfectly copy the functionality, there wouldn't be a change in consciousness (assuming that there isn't some mystical soul tied to the flesh that would prevent it). Once you've got that, you use either a direct connection, or some sort of other method of transmission to monitor the activites of these artificial neurons, and duplicate them in software versions.
You could then allow the person to live in flesh form with the replaced neurons, of if you find some fancy way of doing it, maybe you don't have to eliminate them to do it.