Copy both kv.bin and cpukey.bin to the (usually labeled hdd1: ).

In the Xbox 360 modding community, a is a critical file used to identify your console to Microsoft's servers. Users typically download a kv.bin file to unban a console that has been barred from Xbox Live. Community Consensus

: Most stealth plugins will automatically detect the new files on boot and use them to spoof the console's identity. Ethical and Legal Note