On the Difficulty of setting the Windows 7 Desktop Wallpaper

You need to be a software engineer to precisely and correctly set the Windows background in Windows 7.

I have a multi-monitor setup, and I use a very particular method for laying out windows on my secondary screen: I have them cascaded, from the top-left corner of the screen towards the bottom right, such that a little of the bottom-left corner of every window is visible on-screen at all times, like this: