Confused about auto load core options

I cant understand how it woks, or if even if want to do is possible. Only want a custom “File browser” directory for a specific core. Example: I load “Psx core”, then Load content —> Start Directory ----> my custom psx route. Then, i Load “snes core”, then go to Load Content -----> Start Directory ----> tha other custom Snes route.

Is possible, to do this?

Can i upload a request in github?