The replacement for the 5 volt board is plug and play. The upgrade kit is a different animal. That has to be done the same as the previous upgrade kit. Later this year will be the board sets for replacing boards in a PS2 3 volt system. In picture 7 you will see the top board with the black connectors is for 5 volt systems and the white is for the 3 volt systems. The bottom board is the same on both applications.
I have a board set on the way for my New York Central Niagara with the 5 volt board.