now i think i'm on the right way with this bird, but i have a few more questions for this community.

First of all is the panel state after loading, on my Captain Sim .save file (cold and dark) the whole cockpit is not really cold and dark, for example fuel pumps are all on, engine bleed and ac pack is on, hydraulic systems A + B are on. So i decided to shut everything off and save. Exiting FSX and reloading previously saved flight my  panel state return like first one  :-/
is there a trick to save a really cold and dark panel?

Second one is fuel dump, i can start dumping only tank n°1 , when tank 1 is empty the 3rd tank will start. is this possible? how config to dump tank n° 1 and 3 to 50%?

Cabine pressure is my last question, when climbing with mode selector knob set to auto sometimes pressure will decrease  :-/ , is cabine altitude really working on CS 727 or only a fake?