RSG G1000 Suite and Analog aircraft question

I have the RSG G1000 Suite. While I DO fly MSFS A/C with the G1000, I want to be able to control analog cockpit controls (ie: A/P, Speed, ALT, V/S ) with the G1000 buttons.
Some DO work however most don’t. How can I get these G1000 buttons to control a analog cockpit? Thanks in advance.

You might want to download MobiFlight to see if the panels buttons and such are recognized by it. If so, then it should be simple to assign the functions you want to each input. Then only run Mobiflight when your flying steam gauge aircraft.