You can configure the hotspot or the hotkey with the tray icon, although it’s not the most user friendly dialog. If you move your mouse to the upper left hand corner of the screen, it will immediately tile all the windows. If you have a video playing, it will continue to play in the tiled view. Once you have it installed, you can just press the F9 key, and you’ll immediately be presented with a tiled view. To install this application, you’ll have to run the setup application as well as the Visual C++ redistributable package, unless you have visual studio installed, which you probably don’t.
Now there is finally a Mac OSX Expose clone application for Windows Vista that runs great! Not only that, but it’s open source, so you can improve it if you wanted to. Expose is an application on Mac OSX that tiles all the open windows with the press of a key, letting you quickly choose between them.