I'm pretty sure you need either some more hardware to convert your laptop into a access point, and/or some software. When you connect the Wii to your laptop there is not route out to the internet. You would need to have a tunnel, or route to point back to your primary interface (Where your internet connection is plugged in). I wouldn't have thought that it would dish out an IP to your Wii either, so you would need to manually setup an IP on both your wireless card and your Wii... I really don't see this working to be honest. If you don't want to get a wireless router, get a Nintendo USB Access Point.