You could do tests on chimps and see if the genes associated with chimp IQ are correlated with human IQ. If so, then you could see what introducing them on fully developed chimp brains does.
The other route, is biohackers that hack their own brains. I'm really curious whether the number of people who get their own bioreactors etc will be anything like the number of people who hack electronics today.
Link.
"Razib Khan has an academic background in the biological sciences, and has worked for many years in software. He is an Unz Foundation Junior Fellow. He lives in the western United States."
Razib's writings can be found on his blog, Gene Expression.