Cd Key Mount & B I Just Downloaded A Game And Need To Know How To Convert The Files So I Can Play It.?

I just downloaded a game and need to know how to convert the files so I can play it.? - cd key mount & b

I'm playing, but I went, and you do not have the CD, even if you only downloaded from a torrent, and now I need to know how to install it. It was an image file, so I need a Magic ISO / almost renovation? I just need some detailed instructions on installing the game get to play. I do not need a crack or something for work, b / c I have the keys and the CD. Thanks in advance! =]