Good advice Dan, that is exactly how I centre my steering wheel and it seems to work fine.
Re. the recomended toe setting of 0 degrees, quite of lot of lightweight RWD sports cars use 0 degrees, so that when under way, there is a slight toe out, this ecourages early turn-in to corners, yes there is a danger of wandering, especially under hard braking, but because the steering is so direct, it is easily controllable. It would also depend on what the car is used for. It can easily be changed though, and is a good enough place to start.