Double click to open a different file

[Leo]

You’d need to use scripting. (Edit: Or maybe not. See Lxp's ideas below.)

This script is an example of how to conditionally change what double click does in specific folders:

Play music albums when their folders are double-clicked

Overview This script makes it so you can double-click music albums to listen to them. Here's a short video showing what the script does and how it is configured. (The video is narrated, with optional subtitles.) The script works by changing what d…