I'm wanting to map a few of the G1000 controls to a button-box to make it easier to control autopilot functions while flying - those on-screen buttons are v small and I'm usually flying a small prop plane in a bit of turbulance.

So while I have mapped functions such as alt, alt hold, nav, hdg, climib rate, YD, AP & FD on/off, I'd like to extend it to MFD/FMS dual stacked knob (bottom right of the G1000) with push-function, and the Prog and Enter buttons used to select and engage approach and ILS for autopilot. There doesn't seem to be anything msfs allows mapped to these knob & buttons? 

Yeah, I was also looking for that without success. In P3D times I would have used FSUIPC mouse macros for that, but it's not yet a feature of v7. 

I'm sure some clever person will make that facility available again before long..