If it helps it would appear that right now, at least in respect to the elements required for the LEDs on the SRW-S1 (the only Fanaleds supported device I have to hand), the existing Project CARS 2 support in Fanaleds can do it.
Configure AMS2 to use the Project CARS 2 format shared memory (this might be the default setting, I forget);
Have a process running that matches the Project CARS 2 EXE name, for example pcars2avx.exe. This can be a simple do nothing console app, or maybe make a copy of Notepad.exe and rename it.
Have working LEDs etc