@mkupper: Thanks for taking the time to write up this guide. It seems to cover all my requirements and then some. I am definitely going to give that a go.
As for Alt-F4, I dislike having to kill a program to make it do what I want, but I should get over that here.
Too bad sessions don’t have assigned file extensions. It would be easier to just double click on a session and having NPP open all the files for you.
But, the title of this thread has “feature request?” in it. Maybe a workflow like yours will make it to a plugin or an extension to NPP. That would be very nice!