Funnily enough, I watched a documentary on the Discovery Channel about just that and the assasination on Oswald, just the other day.
They re-enacted the whole scenario in detail from the day when Oswald was shot, and even had the very same people and bodyguards positioned out on the exact same spots(Those that were still alive).
However, the result of the experiment didn't come up with a confirming answer, really, and they basically concluded that it could or it could not have been a "plot" behind it. There were pretty much just as much evidence FOR a plot, as there was evidence going
against it being a plot.
So, no point in trying to find an answer, really.