So which system would I wan to purchase if I wanted all the bells and whistles? And is there a tutorial explaining how to mod my games?

So I have been trying to figure out how to mod the games on my 360 can I mod the game save files using a PC with out hard modding the console if so how do I do so

So I have been scouring the web for instructions on how to mod my 360 so I can mod my games but I have not found any instructions I feel comfortable using is there anyone who can help me accomplish th ...