@satori: Hello, fellow joystick user! I was searching the internet and found your post and saw that the people here on your forum of choice are far less than helpful with this. Over on /r/GrandTheftAutoV_PC we have found that using the Logitech profiler will allow for perfect joystick support. I use a Logitech Extreme 3D Pro and the Logitech Profiler to map the flight keys to my joystick and apply a persistent profile over the game launcher. People have been reporting being able to use other joysticks using similar methods.