No. Just setup a VA command to use a series of keybinds or other already existing commands.
You have to do a few things first, like setting up keybinds that may not have been there to start with. What I do after that is go through the (successful) start up sequence and document each step (i.e. wait times and flipping switches), then go into VA and create a new entry for "Auto Start" or "Engine(s) Start", or something like that using what I just documented and then test it out. Be careful not to use too many combos with ALT and CTRL. For instance, if you have a combo that requires a toggle like Nosewheel Steering and you have to hold that combo down until you release, if you use other keys while toggling with ALT/CTRL you will introduce other functions that will most likely cause problems.
This method works best with Jets and Rotorwing aircraft. Prop aircraft take a little more finesse to start up.