Unlock all armor and recommendations in Halo Reach

With the arrival of the closure of the Halo Reach and Halo 4 servers by the end of the year, I intend to unlock all the armor and content that is in both games to be able to save it, and incidentally that it appears in the Halo Waypoint stats as completed.

My question is, Can I do it with Horizon? Not just the armor and leveling up, but the recommendations as well.

What is the danger of banning? Even without playing any games online.

How would it be done? If you have a good tutorial that explains everything step by step.

Will I need any other program besides Horizon? Which version of Horizon do I need?

Thank you very much to all