Re: "Standing on two feet is easy when..."
I have seen a four legged animal drive vehicles:
http://www.3news.co.nz/tvshows/campbelllive/driving-dogs-test-out-their-skills-on-the-track-2012121017#axzz3cE2PSLPS
Not well admittedly, but when you have 4 legs and no opposable thumbs,... and are a dog, then getting around a race track at all is pretty successful proof that it could be done by a robot.
Adding arms/hands into a small centaur body shape would no doubt help.
Biting the hand that feeds IT
