Toad... What if AH had this.
Add to the little options menu under Combat Trim a selection called Engine Start Sequence. If you do not have it checked, the game works like it does now. You hit E (or whatever you have it mapped to) and the engines come on and you're off and running in just a few seconds. If you do have it checked, then you have to go through key presses to "simulate" a generic engine start sequence. That way, you can have your quick start, and immersion geeks can have a little extra "fun" before they take off.
Of course, it won't look all spiffy like MFS where the little nobs actually move.