Sounds like a claim usually associated with the SPAM to try to sell you some software that's usually only a collection of freeware, trialware etc., bound together with a half-baked frontend.
And whatever they claim, reading a DVD in a CD-ROM drive is impossible for the optical resolution of the CD-ROM read head.
If you can "copy a DVD without a DVD WRITER!" - then they mean converting it to a smaller format - eg. VCD, SVCD or Divx. SVCD and VCD will PLAY in most DVD players, but will not be full DVD quality or features.