Seems that an anonymous source have released the necessary files to get around any current blockades and protection by Microsoft on the XBOX Live, so you can go Online with JTAG/RGH consoles!
They have been confirmed to work by various users, HOWEVER, you should try them at your own risk!
Here's the 'official' info:
Off-Site Download Link: --> http://www.mediafire.com/?b8ojiusu46rs4
XeLive, Xbdm.xex, Launch.ini Files:
1. Place the folder at the root of your hard drive.
2. Use my launch.ini and xbdm.xex and put on root of hard drive, not in the XeLive folder.
The launch.ini has all features that need to be enabled/disabled as well as all plugins, and an xbdm.xex that allows memory edit, connected to xbox neighborhood, and will also help with connection. This will allow connection to live, thus removing DNS errors.
1) Can't connect, DNS errors?
Use the files I have provided, it will remove liveblock, and has all plugins needed to run the files.
2) Asking to update?
You may be on 15574, but you may not have the recent updates. If that is the case, you are good to update your console. If you do not have 15574, use Swizzy's Tool to apply dashlaunch, and update to 15574. This is the safe way of doing it. This should fix that error.
WARNING: Unplug your external hard drive or usb when you update dash. When you update your dash it unformats your enternal HDD. If you do not, you will lose all files on it!!
AGAIN, its up to you to try this file replacement, as nobody knows what could happen to your console or XBL account in the future!
Update: here on xbox360iso are more ppl that have claim they have trid it and been online for more than 6 hours on their RGH/JTAG consoles.
Note: need to be a member to view topics, also from what I read only seen 1 report of an instant ban xbox360iso