It is amazing that the crew had had zero simulator time on this aircraft type.
They had infact had exactly the same sim time as any other pilots worldwide on this type as there were precisely
zero 737-400 simulators in the world at the time!
It would be impossible to restart the engine if the fire warning handle had been pulled (i think) because the engine bleed sov, fuel sov would have been forced closed.
Wrong. You can push the fire handle back in & it is all restored.