Use Your Laptop As an Xbox/Xbox 360 "Wireless Adapter" on Windows XP/Vista, and Mac OSX

I hate how the Xbox 360's wireless adapter costs $100, so I looked online on how to use any adapter as one. I couldn't find an article on that, but found that you can use your laptop as a gateway, but many articles didn't work, the way they said to do it. I looked on Instructables to see if there were any how-to's about it, and there were none, so here is my second Instructable.
Things you need
Laptop
CROSSOVER Ethernet cable (You can't use the one included with the xbox. But chances are that you have one lying around. Most will be labeled saying crossover. Thanks to sk8erek who reminded me to edit this.
Xbox

I Edited this to show how to do it with Vista and Mac, so this will work for all 3. The one done by me is for Windows XP. Step 4 is Windows Vista. Step 5 is Mac OSX, both Leopard and Tiger

P.S.- This is new information. I just edited this on January 3, 2008. If you do this, you won't be able to connect to the internet through your Ethernet port anymore. Only providing internet will be possible. If you want to know how to fix this, scroll down to my comment about it.

EDIT: A fix for the above problem was posted in a comment by timheppner. I have not tried this myself, but he says it will work, so try it out.
"EDIT 2:" A guy named bsblade told me that my instructions on doing this on a mac were wrong, so I updated it according to his instuctable. To see changes, check out step 5

Step 1: Connect Your Ethernet Cable to Your Computer and Xbox

I know this doesn't sound like it should be the first step, but do it anyways. Trust me, It will work out in the end.

Step 2: Change Your Internet Properties

We have to change the internet properties so that your computer will share wireless internet with the Ethernet adapter. See pictures. They are in order as they should. They also have notes. After doing what all the pictures say, hit ok.

Step 3: Repair the Ethernet Connection

This is simple. Right click the Ethernet Cable icon in the task bar, and hit "Repair"
Pictures say it all.
Right click the non blurred icon. Then hit repair. It shouldn't have a red X though.

Step 4: On Vista

1. Go to start
2. Run
3. Type in ncpa.cpl
4. Hit OK

Thanks for the help idogis1

Step 5: For Mac Users

step 1
What you'll need
You don't really need much to do this. All you need is: A Mac (this guide is for 10.4 but im sure it would be very similar on 10.5) And XBOX 360 (duh) A wireless ne&

step 2
To begin
1. Open up system preferences and go to Network. 2. Make sure location is set to "Automatic" and show is set to "Built-in Ethernet." 3. Now where is says "Configure IPv4,&

step 3
Now
Your router should have an IP Address, and it is usually 192.168.1.1, check on the bottom of the router to make sure. There should also be a username and password down the&

step 4
Back to System Preferences
1. Go back to System Preferences now and click on "Sharing." 2. Click on the "Internet" tab. 3. Make sure that on the drop down menu Airport is selected. 4. Click on the&

step 5
Now on your XBOX
1. Go to the "System" blade on your dashboard. 2. Go down to "Network Settings." 3. Now select "Edit Settings." 4. Select your IP settings and choose "Manual." 5. Now e&

step 6
Congratulations
Congrats. You are now connected to XBOX Live without having to have bought one of those ridiculously expensive wireless adapters. Have Fun!

Thanks to bsblade for his instructable. To see the whole instuctable, go to https://www.instructables.com/id/Use-your-Mac-OSX-as-a-Wirelss-Adapter-for-you-XBOX/