Hi,
Funny enough, as I create Elearning Modules for the company, I have gathered a
large arsenal of programs over the years, sometimes just to do one off jobs.

I have used a program called Print Screen by a company called American
systems, which does exactly that. You tell it where you want the file stored,
what format etc, dedicate a shortcut key to it, and everytime you hit the Print
Screen button, it auto saves it to that directory.


http://www.americansys.com/ps.htm


Not usre if it is what you are looking for but it did that for me.