UltraISO can help you to also create ISO's. After it is Install, you will be able to go to your Windows Explorer, navigate to your Disk you want to make an ISO of, right click on the Disk and See the Ability to Create an ISO of the Disk. Or take a Directory of Files and make your own ISO on the fly..
This is the window of ultralISO: Which part should I add my files in? I think in the half bottom part because there is a navigation. However, even if I add my files in this part, there isn't a burn button as in the half upper part.