It has been a few months since I did this but I believe you just need to use the Import function in Nero Vision. This will get you the VOB files that you will then need to burn back on to a DVD. I used a DVD-RW in VR Mode which I believe is the same.
The alternative method was to install InCD then just copy file files from to a directory using Windows File Explorer. From there you can use Nero Burning ROM to and start a DVD-Video project and drag the VOBs into the project and burn. Burning ROM will alert you if you are missing files or have the wrong structure if you start with a DVD-Video project.
Sorry I cannot give you a step by step but do not own a DVD RAM.
DRU500A-2.1A, DRU710A-BYX5, PX716A-1.11, DW1655-BCIB, LH-20A1H-LL0C, GMA-4080N-0S35