i don't know about that orbob
i think from the moment anakin hits that lava, he will be out of it
until he wakes up as a machine.
i always pictured a deep-fried unconcious anakin floating
in one of those healing water-tank things (im sure someone here
knows the correct name of what it is) and not being concious until
he is a machine.
palps would be standing there, anakin would ask "what happened, where's padme", sidious would say "she's dead" or even "you killed her" and anakin would flip out completely and become vader. then the next anakin/vader scene would be fully dressed vader on a mission, then will come some memorable lines as only james earl jones can deliver.
thats what i think anyway.
btw, i wonder, in epIII will we see an unmasked vader speaking in james earl jones voice? that would be soooooo wild.