Need Someone To RGH An Xbox 360

So I have just bought a game, and it's from Japen. Little did I know that Xbox 360's restrict what country a game should be from. So if you try to play a game from Japan on an American Xbox, it wont allow you to. This is because the format of the game is NTSC-J instead of NTSC-U. But what can be done is, there is a way to make Xbox 360's region-free. So I can be free to play the game. But first the Xbox has to be RGH'd (JTAG). I want to someone who know what they are doing, or that has experience in RGH for Xbox's.