The best option would be to contact the current xbox game support and ask them about it. Since you asked about original game support then I believe they have made a new one. You can contact them via internet, or dig out some old game you have and look for the phone number.
You don't. 360 support has it's own phone number that will connect you to the proper agents for help. They will be able to direct you appropriately. Remember, not all agents are trained in both systems, and therefore you only increase your frustration by calling the wrong place.
If you go to Microsoft's website and register, you should be able to find contact info to call them. Also, if you check in your owners manual that came with it, contact info will be included. Hope this helps.