Things You'll Need
Instructions
Connect the Nintendo Wii's audio/video output to the XGA converter's audio/video input via the RCA cables. The cables will be color-coded and require that you simply match up the appropriate colors on the two devices.
Connect the XGA converter's video output to the laptop's video input using the corresponding cable. You have two options here: S-video or VGA. S-video is less expensive but does not transfer sound and offers only blurry video. VGA does not transfer sound either, but transfers much sharper images.
Place the Wii's motion capture bar, which looks like a long, skinny speaker, atop the laptop screen. You may need to tape it down. This bar is what captures the signals from your Wii remote when playing the game. However, if you are using a standard GameCube controller, you do not need to place the motion capture bar.
Power on both the Nintendo Wii and the laptop, which should prompt the Nintendo Wii's images to start playing on the laptop screen. To get back to your normal desktop simply disconnect the XGA converter from the laptop. You will still need to use the standard Wii controllers, as the laptop screen will function only as a monitor and not the Wii device itself.