If you have a DVD-ROM drive and a DVD burner then you can simply use your DVD burning software to duplicate the DVD. If there is no default option to duplicate a DVD you can browse to that DVD and select all of the files just as you would on your hard drive and have it burn a new DVD.
The catch, though, is that software DVDs include copy protection, preventing the duplication of the DVD. In that case it's a dead end as circumventing the copy protection is illegal.
what do u need to copy files on a dvd?i can copy files on a cd but not dvd