Here is a basic noob guide on how to stealth patch and burn xbox 360 games using abgx360 and imgburn.

I reccomend using these discs:
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Files you will need:

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Tutorial on how to use the mod: here

Open your .iso image by clicking the open file button and locate your game iso file. (here im using Assassins creed 2)

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Open the options tab and copy the ticks like below.

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The manually patch tab should look like this.

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The autofix tab should look like this. (i set mine to level 3)

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Rebuilding should be like this.

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Misc tab: You MUST make sure splitvid is added if it doesn't exist.
I cant stress enough how important this is for the new ixtreme LT.

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Now save your settings by clicking file and save settings.

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On this box just click ok to save as default. (this auto loads these settings upon each ABGX360 start)

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Click launch to start the checking process.

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If you dont have the .dvd file one will be created for you.

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All green so far. (thats good)

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Thats it finished you can see everything has passed as it's all green.
If anything comes back yellow just run abgx a 2nd time and the autofix should have fixed it.

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NOTE: You may get an error with no matches etc.....
This may be that the game is too new and there hasn't been a verified rip of the game yet.
(@ this point it may be unsafe to play this game without being stealth verified.)
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So now, you want to burn a 360 game. Follow these directions and you will have 100% success rate*.

Here is what you need:

1. ImgBurn (Link at top)
2. A Dual-Layer DVD Writer (must be able to write DVD+R DL).
3. High Quality DVD+R DL discs (Verbatim DVD+R DL that are Made in Singapore are the most recommended. Picture at top.) You MUST use DVD+R DL, NOT DVD-R DL.
4. The .iso and .dvd file of the game. If you get a .000 file instead then that is fine. The .dvd file contains the layer-break info for the .iso (or .000).
5. A modded 360. Be sure to have the latest iXtreme (Lite-Touch at the moment). All of the latest games are Wave 3/4/5/6. If you attempt to play a Wave 3/4/5/6 title on iXtreme that is lower than 1.51 then you will get a Play DVD error.

Now follow these steps:

1) Download and install ImgBurn if you don't already have it.
2) Have your .iso and .dvd file ready in your desktop or inside a folder. They must be together in the SAME foler.
3) Insert your blank DVD+R DL disc into your DVD Writer.
4) Start up ImgBurn.
- Then Click tools > settings > write
- Now in "Options" Click "User Specified" and paste this "1913760"
-NOTE: You will not have to do this again.
5) Click "Write image file to disc".
6) In the lower-right hand corner where it says "Settings", make sure the write speed is set to 2.4X.
7) Where it says "Destination", make sure your DVD Writer is selected.
8) Now where it says "Source", click the folder with the magnifying glass. Now go to your .dvd file and double-click it.
9) Select the big button below "Destination" to start burning.
10) Now tick the boxes that says "Eject disc" and "Close Program" and "Verify".
11) Finally, let ImgBurn burn the game. Don't do anything else on your computer. Just go watch some TV. When your DVD tray ejects, the burn has finished.
12) Test it out on your 360.

And that's it! You just have burned a 360 game to play on your modded 360.

*Results may vary

Thanks to: NDarkness & teajunkie