yes, that is the only sophistication and it is a fairly major one -- indicating some money and major friendlies.
Not neccessarily. Training on a much smaller aircraft, with maybe some time in a simple mock up or computer sim, would be sufficient. Now if they had to be able to take off or land, that would be one thing, but to just fly the thing into a building, not nearly so difficult. However the organiztion and logistics aspects, as opposed to traing the kamikazes, might require more resources than even OBL could muster.