Remove doors without unbolting hinges?
Personally I would not scribe, as the FAM says to do ( I assume scratching the paint with a pointed object is what the are suggesting)
If you must, use a grease pencil, but unless you have fresh paint you can usually align it to the dirty / discolored paint.
Also I see no reason to remove the door hardware or trim.
I am a perponant of following the FSM, but sometimes there is no reason to remove somethings.