Sorry to bother again, but does anyone know how to move the car left or right while aerial boosting without doing a stunt?

If you are confused what I mean, it is what the WR run does in NFM1 Race Only at 16:42 and 16:49

Hey, a bit late to the party, but better late than never. You can't aerial boost to the left as far as I am concerned. Aerial boosting to the right works by holding all four arrow keys + SPACE. Hope this helps somebody!