Freeze, dice, slice, scan with an electron microscope, interpolate into a 3D model, analyze into a map of connections, construct the equivalent with software neurons, simulate the sense inputs, throw the on switch.
That's a very interesting paper and appears to confirm that computational power is the least of all the problems - whilst even in 2005 it was possible to run a simulation based on 10^11 random neurons, even the scanning technology we have available at present isn't yet adequate.
http://www.philosophy.ox.ac.uk/__data/assets/pdf_file/0019/3...