Xview seems interesting
Another member had also managed to code M modes but it wasn't of any use since our cars don't have the M1/M2 buttons on the steering wheel.
Also, can you do me a favor and check your heads up display options in the display settings and see if you have the option to turn on and off the rev/shift light in the HUD? I used to have it but I believe it disappeared after I coded the tyre pressure gauges in the live cockpit.