I'm thinking you downloaded a ISO file. Which is a image of a disk (CD or DVD). Basically it takes a exact picture of the disk and then you are able to make an exact replica of that disk. You will need a program like Nero to put the image on a blank disk. Generally all you have to do is click on one of those 15 files and extract them, this will generally extract all of the files for you into one or two large files like a .bin or .cue (maybe .iso). You use this to put it on a disk. If you have the torrent file you used to download the file (the small lil file you click on to launch bittorrent and start downloading not the file itself) pm me and ill get it from you, view the file and help you put it on a disk. Also this may be helpful to you. If not disregard it.
http://www.testmy.net/forum/t-890