Keep in mind that the 990 has six video inputs, with the default names (corresponding to the labels on the rear and front panels) of DVD and Video1 through Video5. Video5 is the front input: the only s-video, composite video, and analog audio connections that it can use are those on the front panel, even though it can easily be configured to use any digital audio input as well as any component or DVI input. The scheme you have developed will work fine, but you'll just need to remember when you go to hook things up that the Wii's analog connections will probably not be hooked up to the input defined as Video5.