I'd heard there was an economy drive going on in F1, but three people to a car!
As it's a Renault, do you think this is PR, maybe they're claiming Piquet simply got lost, so they now provide a navigator, and if that fails, a mechanic come road sweeper to clear the track and prevent safety cat controversy?
Alternatively, maybe Kubica has extended his contract and they've discovered that with the obvious aerodynamic advantages of having Kubica as the perfect wind-tunnel designed driver they can push out the sides of the car to take the pit crew along so stops can be made anywhere on the circuit... I can't wait to see the design of the trailer they'll use for the spare wheels!