To all jtaggers :

Download LEAF and Make an account. You will need 2 ethernet cables. One for your xbox360 and one for your pc. Connect these to your router. With LEAF, you can connect to other users of LEAF who are also using this method. 'Leechers' can download LEAF also and do the same, and they can connect to you through System Link. That means you can host modded lobby's OFFLINE. You can also use this when you're BANNED. It's a very easy method to do. It's just simple System Link Modding without even recovering profiles!
Hope this helped! REP if it did!

Download : [ Register or Signin to view external links. ]
OR
DOWNLOAD LINK : [ Register or Signin to view external links. ]

""PLEASE NOTE THIS GUIDE WILL HELP YOU!
BUT SOME KNOWLEDGE IS REQUIRED ""

Step 1: Download app.

Step 2: Register a account for app (free) on the program.

Step 3: Before you even start to connect or host, take out the adapter or Ethernet cable that is giving you you're xbox a connection to xbox live. Now take a Ethernet cable and connect it to the back of the xbox and the Ethernet port in you're computer. (connect thexbox360 to computer)

Step 4: Put you're xbox 360 game that you want to play through leaf in you're system and sign into any profile you please. Go to the setting system link and if you want to host a Modern Warfare 2 system link game, click create game. Then pick you're options for the game and click start game.
easy! game in xbox,simply.

Step 5: Now that you're done setting up you're xbox 360, open up Leaf and login.

step6: create server, privet! network name (your name)

step7: add members.. link i do.

and your privet network for gaming is done.
fast easy and "clan it up your way"
hope this help any question, or if you want more details comment and i will help as much as i can
REP! this!