System as in your parts? Or System as in the OS?
It won't fit onto a CD (700mb); you'll need a blank DVD (4.7GB). And it's not complex at all; it has you install a MS Download manager, and then downloads the ISO for you to a location that you select. Then you can use ImgBurn (or the built-in Windows 7 ISO burner if you have Windows 7 already) to burn the ISO image onto a blank DVD.