I have a teaching DVD, is trying to copy it to a DVD-R, how do?

I have a teaching DVD, is trying to copy it to a DVD-R, how do?

My PC is the DVD recordable drives, software nero

one method:nero to copy the CD-ROM features, the original disc into choosing the next step copy, after the completion of the tips will be placed in a new CD-ROM allows you to start burning This will OK the.
Two ways:There are ways that you mirror the production of CD-ROM, and then use nero “image to burn to CD” function, select the image file, burn.On the first floor of the complete Correct.Absolutely correct