Guys... Please stop responding to tegirinenashi. He's clearly a filthy troll. Ignore him, he'll give up eventually.
I'm sure no one is falling for his stupid biased opinions, there's no point arguing about them.
OK... now that I know exactly what you want I think that DisplayFusion is what you're looking for. You'll need a Pro version though.
PS windock does "the same thing" as Dell software, only better. Much better. But that's only my opinion.
http://www.ivanyu.ca/windock/
There's 1 small thing I don't like about it but otherwise it's perfect. A lot better than anything I found out there. Try it.