I'm looking for a way to automate the switch between stock setup (default views) and Chaseplane. Sometimes I fly with the keyboard so need those default assignments kept. Then when I use my HOTAS I'd like to enable Chaseplane along with the changed keyboard mappings. So a way to script the switch would be good enough if that is possible. I need to be able to switch back and forth before starting a P3D session. Any ideas are welcome.

It might not be the most elegant solution, but you could have two different key mappings and swap out the files before launching your sim.

For FSX for example, the keyboard & joystick mappings are stored in this location & file:

C:\Users\<username>\AppData\Roaming\Microsoft\FSX\Controls\Standard.xml

I can't remember if the sim allows you to directly export different profiles from within the game or not. If not, just make copies of this file for each configuration and swap them out as required. At least until someone comes along with a better solution!