I searched for an application that would display and allow switching between any of the available power plans (Windows 7 Pro) with a single mouse-click instead of the two options offered when the Win7 battery meter tray icon is clicked. The search results suggest this is a common request from Windows users.
The application "Battery Mode Portable" does this and has other useful facilities packed into its small size. It can be used as a direct replacement for Win7's battery meter tray icon. The two freeware versions available are 32bit and 64bit.