>>How do you want to use (non-sentient, I assume) AI to become immortal, btw?<<
My guess is when the brain stores information from sensory stimulation they are stored together by time with some parts of memory having a greater relevance to others, so one doesn't associate a hand movement with a sound as easily as they might with sound and sight.
The idea is by studying the interactions between these associations I can create a self-aware AI. Once that is accomplished then I can begin work on sight, sound, etc. interfaces with my AI "brain". Then I will create a robot that uses this brain and study its effects. Because the robot uses a brain that relies on associations for reasoning just as we humans do it will learn language, be self-aware, and be able to communicate its thoughts with me.
>From there I can replace parts of my brain with robotics, or I can reroute signals from my brain into my AI brain interfaced with an avatar in a virtual world.