Is it possible to customize the Application key on Microsoft Natural Ergonomic Keyboard 4000?

The Microsoft Mouse and Keyboard Center application doens’t allow you to customize the ‘Application’ key, which is the right SUPER/WINDOWS key on other keyboards. Customization isn’t provided for the Zoom key either, but through a hack of the commands.txt file I’ve been able to change it. Is it possible to do something similar for the ‘Application’ key as well, in some way? If anyone knows, kindly share. Thank you.