Green is good, my friends, especially since these steps will save you from buying another one of those sometimes pesky wireless internet adapters.
Now, before we begin, let me clarify that this instructable is for creating an Internet Bridge Connection for gamers with Windows Vista and Windows 7 operating systems on a laptop. I'm not sure if it'll work on a regular PC, but it wouldn't hurt to try it. If you're still using Windows XP, I suggest hopping over to walamoonbeam's instructable, where he offers the same, basic principle, starting from the beginning.
Edit: Walamoonbeam has also added instructions on how to use a Mac as a wireless adapter.
Before diving into this instructable, make sure your XBox360 is connected to your laptop via ethernet cable and your Xbox is on.
Here we go....
Step 1: Open Your Network Connections
Opening your network connections should be some what similar between Vista and Windows 7. If there are any differences, those, of course, will be updated.
Opening your network connections:
1. Click the Window Icon at the bottom, left corner of your screen (start button)
2. Click on Control Panel on the right side of the start menu
3. Click on Network and Internet
4. On the left side of the window, click Manage Network Connections
Now, you should have a box that has various connections, only two of these are important; Local Area Connection and Wireless Network Connection .