You don't use IGN OVRD for a normal start. You select IGN A or B. Packs automatically turn off when A or B selected. No need to configure fuel pumps if fuel system is in AUTO mode. Fuel lever on is max motor N2 and a signal is sent to the MSC for ignition when the fuel lever is placed to on (cyan lightning bolt in EGT indicator on EAD)
GE starts much quicker than the PW.