I think 'fly744' got the answer to the 'technical' stuff in post#2?
It does not need my help to achieve what you describe, Hetfield - and it was not "these guys" it was "that guy". Lucky indeed only 28 were injured and all were not killed. My views on
Computers in the cockpit and the safety of aviation are on record. He:
Ignored F/O's warnings
Appeared to 'trust' illogical fuel predictions
Ignored 'short of fuel' warning 1 hr before crashing
Was reported to be most senior H-L Captain - until
fly744 - you say you are a 744 Captain. I would recommend (I guess you would know anyway?)
a) listen to the F/O's views
b) when fuels start to depart from the expected, consider abandoning any gizmos like the FMC and revert to a straightforward 'how-goze-it' graph
c) if the gizmo then tells you you will run out of fuel, take note.
BTW - did we ever get a link to an English translation of the Austrian report and what happened in the court case against the Captain?