Need "HELP" backing up Dual-Layer DATA DVDs

I need help backing up an Automotive Repair Program I recently purchased. The program contains Dual-Layer DVDs which consist of 10 DVDs. Some time ago I had purchased the exact same program but an "older version" which was a copied set and it contained 19 single-layer DVDs. How do I go about backing up this newer "VERSION" of Dual-Layer DVDs to (2) single layer DVDs.Is there a program out there that can make this an easy task. I have opened up Each "Older Version" DVD and tried to transfer the exact same files from the "NEWER VERSION" DVDs to DVD+R but this seems to take way too long to do. Is there another way around this.Any help would be greatly appreciated.