Hi Research Analyst, I use a super freeware program called ImgBurn. It has a nice interface and is easy to use. You can set it to burn iso images to CD or to your hard drive.
I use it to burn iso images of Linux distros to my hard drive, then put them on to my bootable USB stick. I've just written a guide to making a bootable USB stick - feel free to take a look if you're interested.
Hope this answers your question