Note 1: There is no setup file, this is a standalone exe. You'll have to unzip this app wherever you want it to be.
Note 2: This app needs ".Net framework" installed. If it's not you'll have an error message like "the application failed to initialize properly (0xc0000135)".
If you understand nothing about the flash animation above then you probably don't need this program.
I made this small program because my GPU driver doesn't handle this feature and I coundn't find any other satisfying program.
Screenshot (with a fake example - screens must be placed where your actual screens are):
Oct 22nd, 2009: Just finished this app and put it online (version 1.0b). I wrote this app in c# using .Net framework.
Sources are available at sourceforge (not sure I released the correct files though). I tested this app on my 2 computers only...
For a stupid reason I have to provide a dll along with the standalone exe, I'll have to find a way to fix that. I suppose
GPU drivers will offer such a feature sooner or later, I just wrote this app because I couldn't find any good solution right now.