I am currently mapping the commands from Falcon BMS and run into one problem.
I would like to have three different levels of commands.

For example, when on the green light, all commands will be mapped for Nav mode, Red - AA mode, Yellow - AG mode.
I have put in separate commands for each in Mode 1, 2, 3.

However in the CM script I have the following

IF ([CURRENTMODE==0]) THEN
CMS.B6=JS1.B3;
ENDIF
IF ([CURRENTMODE==1]) THEN
CMS.B7=JS1.B3;
ENDIF
IF ([CURRENTMODE==2]) THEN
CMS.B8=JS1.B3;
ENDIF

However I don't know the keyboard commands for
B6 - Nav to AA
B7 - AA to AG
B8 - AG to Nav

If you have the key commands for for BMS I would appreciate it. (I believe they are different from Falcon AF as they do not work).

Ive been trying to figure this out for almost a year now lol and also how to use the shift button on the stick with BMS. Any insight would be appreciated.

To use the shift button.

Designate one button to be the shift button...I use the throttle middle button (button 3). Click on the Shift square (located at the top right) so that there is a check-mark. In the Normal Action, type in the word " null " (no quotes).

Then go to the button you want to have a secondary action.

For example - On the fighterstick, Button 4, you may have under the Normal Action the keystroke command for autopilot " A ".
You can also put a command in Shifted action (below). You can put the keystroke command for Flap toggle " F ".

When you are in the game, you would push button 4 only to turn on the autopilot,

To toggle the flaps, you would push the designated shift button (Button 3 on the Throttle from before) AND button 4 on the fighterstick at the same time...this will execute the command for flaps.

Get it?

I can tell you the callbacks
SimICPNav
SimICPAA
SimICPAG

They have default keyboard shortcuts but they are needlessly complex ctrl-shift-alt type affairs. If you're smart enough to program a CH joystick in script you are plenty smart to edit your key file and use more sensible and custom keyboard shortcuts.