Finally, a workin version of the Halo Reach Aimbot! I've been testing it for about 2 weeks now and have not been detected by Bungie. However, other players would get suspicious if you pull of something totally insane. I strongly suggest you do not be wreckless with this tool as you will ruin it for everyone!
You can download the Aimbot along with installation instructions here http://depositfiles.com/files/uaxspuefk
I would recommend that you should use a USB flash drive to copy the files over to your Xbox since this is the easiest way to do it.