Share wireless connection through Ethernet Port.

If you own a Mac, you plug into ethernet, then go into System Preferences, then go to Sharing, then go to Internet Sharing and select "Share your connection from Ethernet" "To computers using Airport."

You need to set up a network bridge. What OS?

Edit: XP internet connection sharing

This might work. Go to the control panel, then to Network and Dial-Up Connections, find your wireless connection, go to the properties for it, then to the internet connection sharing tab (which may be under Advanced), and enable sharing. Then, pick your ethernet connection as the one you wish to share it through.

Once you connect another computer to that port with a crossover cable, you should be successfully sharing that connection.

Note that modern ethernet controllers may not require a crossover cable, so try it without one first if you don't have a crossover cable handy.

I do this with my xbox 360 and my laptop. You get an ethernet cord, make sure it is connected, then go to the control panel and find "manage network connections" which is the network area of the control panel (no surprise). If sharing does not work by going to properties, in your case, you may have to create a network bridge between the two controllers, which is somewhere in properties I think. People do it all the time and it isn't to hard. Look it up.

All you have to do is go to the Network Connections folder (you can get to it from either the start menu or the control panel) right click your Wireless Connection and click Properties then under the Advanced tab click the Allow other users to connect through this computer's Internet connection check box and pick Local Area connection on the drop-down menu and click OK, then connect an Ethernet cord from your computer to the device you're trying to connect to. You can use either a regular (patch) Ethernet cable or a cross-over cable since it automatically adjusts the signals to work either way (might not work for old computers though).