Duplicating CD to DVD

If you try to duplicate a data CD to a blank DVD, it won't work using Sonic RecordNow Data 2.0.4. This is surprising since DVD has more capacity than CD. In terms of cost per MB, DVD is more cost effective than CD. As such, people will buy blank DVDs rather than blank CDs.
The solution is to create a ISO image of the CD and then burn the image to a blank DVD. In Sonic RecordNow Data 2.0.4, you can do that by using save and burn image. Similar options are not available in Nero Essentials 7.9.6.4.