I just got this setup and tested it using Halo2. The cool thing is you can use your xbox360 as long as it has an external hard drive. Basically I have my xbox 360 wireless and my Laptop wired to the same router. I set the port forwarding on my router for both my laptop and xbox I then turned off my firewall on my laptop. Note my laptop is ######ty being used for just this.
I can help anybody set this up via TeamViewer, I followed this setup with a different setup. I am ready to play OGR, island thunder GR2 summit strike anybody else