Restoring a hard drive backup

I have backed up the contents of my hard drive on 2 DVD-RW’s. How can I restore my hard drive using these discs? I rebooted my computer and chose to boot up from the DVD ROM first in the BIOS. I then saved and exited the BIOS. It looked like it was accessing the discs and I thought everything was going ok until it gave an E (DVD ROM) prompt. Where do I go from here or what do I type to initiate the restoration process?

Type NRESTORE and then press the enter key.