OK, gents, I've found and downloaded FSScreen 1.1 and it's a very nice piece of work. It's easy, works well, and as advertised, doesn't "hit" FS at all, performance wise.
Having said that, there's a line in the readme file that says...
"The file is saved in the program directory of FSScreen, but you can set another directory as working directory for FSSCREEN.EXE, then your screenshots will be in that directory."
I'd like to do that, but can't figure out how. Someone a lot smarter than me once said, "Every solution creates a new problem." Thus it is with this