There are two different Free (Freeware) programs that you can download to replace your Explorer Logo's or Advanced users can alter a setting in the Windows Registry.
The first program 'IEtweak 2' is a nice small easy to use program that has a nice Interface and a few other options to choose from. Sadly though it cannot change the 'Static' logo, only the Animated one. Personally I think it looks a lot better when you have a different static logo displayed.
The second program is 'Toolbar Control', this is a larger program but can also display a different logo for your Static image. A bonus with this is that you can easily remove the Explorer branding logo in Windows (Top right ).