Seeing this is going nowhere, could you please explain why you would like to change the default behavior? I mean, both left and right click already have very important functions. What's wrong with the defaults: mouse-over = preview, left click = restore <> minimize, right click = context menu (jump list).
I'm of course not completely 100% sure about this but I think this kind of essential basic functions of Windows can not be changed. Especially when you talk about a program with only 1 open window, I really can see no way to separate the behavior from a program with two or more windows.