You can burn the iso images to physical discs using cdrecord, for example, or you can try if it works by just mounting them:
Code:
mount -o loop /path/to/image.iso /path/to/mountpoint
After that the contents of image.iso should be visible in /path/to/mountpoint directory. Some programs might be able to handle the image as if it was a real cd device, but that depends..usually you'll need to mount the contents.