Things You'll Need
Instructions
Purchase a wireless router with DD-WRT firmware already installed. This firmware will allow the router to receive a wireless signal, giving your Xbox 360 a connection to the Internet.
Connect your DD-WRT router to your computer. Launch your Web browser, and type in 192.168.1.1 into the URL search box. A website will open, and ask for a user name and password; the user name is "root," and the password is "admin."
Click on the "Settings" tab on the DD-WRT website, and change the router to a "client mode wireless" mode. This will allow the router to receive wireless signals from other routers.
Remove the DD-WRT router from the computer, and plug it into your Xbox 360 using the Ethernet cable.
Turn your Xbox 360 on, and check for an Internet signal. You will now be able to use Xbox Live.