Are you looking to a modded console, or are you trying to install this specific game on a system you already own?
Xbox 360 JTAG Explained (What It Is, How It Worked, and Why It's Rare) Disney Bolt [Jtag/RGH]
You will likely see this terminology in listings from or modding services on platforms like Facebook Marketplace or specialist forums. Sellers use these "solid features" to demonstrate that the console is "online ready" with mod menus and a library of tested games already installed. Are you looking to a modded console, or