Perhaps Harry will do something with his personal copy of Hermione and a hack of Merlin's computer.

Just hours before:

"Of course there is!" Harry said. The boy suddenly looked a bit more vulnerable. "You mean there isn't a copy of me living in your head?"

There was, she realized; and not only that, it talked in Harry's exact voice.

Given Voldemort's novel formatting of his brain, Harry's apparently already got the hardware to contain or access one extra soul, how much more would he need for another?