Credit to nrk4594
JTAG ONLY
You will need a few programs for this tutorial ...
Xbox image browser..... http://www.megaupload.com/?d=884A0S5M
Create Iso..... http://www.megaupload.com/?d=Y4SIIBQ2
Iso2god ...... http://www.megaupload.com/?d=L5IGMRLK
Step 1: Extract Contents of Scene Release ISO using Xbox Image Browser
To extract the contents of the .ISO, we will use Xbox Image Browser.
Run Xbox Image Browser.exe and select File-->Open Image File

Select your XBOX 360 .ISO file. For this tutorial, we will use Madden NFL 2010.

Right Click on the name of the .ISO and select extract

Create a new folder to place the extracted files in and click OK

Once the files are extracted, go to the folder and delete the $SystemUpdate folder.

Step 2: Create a new ISO for ISO2GOD using Create ISO
To create a new .ISO file to use with ISO2GOD, we will use Create ISO
Run Crear iso.exe(create iso)

Select the folder from Step 1 for the Source Folder and select a location to save
the new .ISO.

Click Create Iso

Step 3: Convert ISO to Games on Demand format using Iso2God
Now, we will use Iso2God to convert the .ISO to Games on Demand (GOD) format.

Select the .ISO from Step 2 as the Image Location and
create a new folder for the Output Location. The title
details will automatically be generated by the program

The .ISO will now be placed in queue. You may add more .ISO files created from Step 2 or convert just one .ISO for now.

Click Convert. The program will now convert all of the .ISO files in your queue.

You now have successfully converted a full game rip to Games on Demand format.

Now, to play the game, just copy the folder created in step 3 (in this case 454108C6) to the hard drive on your JTAG XBOX 360 at this location:
Hdd1:\Content\0000000000000000\
Madden NFL 2010 for example, will be located:
Hdd1:\Content\0000000000000000\454108C6
There are several ways to copy the game to the XBOX 360. Personally, I copy the GOD folder created in Step 3 to a usb flash drive, insert it to my xbox
360 and copy to the XBOX 360 HDD using Freestyle Dash 1.09 that I have installed on my JTAG XBOX 360.
Now, to play the game, just go to Game Library, select Xbox 360 Games and select the game you want to play by hitting the Y Button.