Really george? DVDRW means its a Digital Video Disc ReWritable drive. You know the ones that burn DVD's. A regular DVDrom drive just plays them like a dvd player. A far as cdrom goes that not a DVDRW or even a DVDrom drive. Put a dvd in your cdrom and see if it works. if it does then you dont have a cdrom drive. No on a more serious note if you look at the label of the drives they will say DVDRW. See pic below.
http://i40.tinypic.com/2w7q2x4.jpg
If you notice in the top right is says dvd/cd rewritable drive.