jeney has my technique down.

Whenever I save a .PZ3 I always select and copy the name I'm using, render; and save the render by pasting that same name, and browsing to the same directory as the .PZ3.

When I open WIndows Exlorer, I switch to Thumbnail view, select the thumbnail I want; switch to Details view, order by Name, and open the .PZ3 with the same name(next to) as the image I have selected!