Even 'big' planes fly the same as little ones so where's the drama there?
They weren't being asked to do anything requiring a great deal of skill - point plane at one of the world's largest buidings and hit it, as mentioned before, on a perfectly clear day.
There's plenty of information out there that would have assisted them in navigating the aircraft towards the city itself, albeit it tuning in a basic navaid or as Ka8 mentions, bunging something into the FMC.