The included AppleScript has the functionality of the original DVD Imager, but with less hassles. First create an application from the AppleScript in Script Editor or AppleScript Editor named "Son of DVD Imager". Next, drag one or more valid DVD folders (each containing at least a VIDEO_TS folder and an AUDIO_TS folder) onto Son of DVD Imager's icon. If dropped folders are Finder folders stored on your hard drive, Son of DVD Imager will create a disk image for each in the same location as the dropped folders. If the dropped folder is the volume of a mounted DVD, the disk image will be created on your desktop. I suppose if you mounted a commercial DVD with Fairmount, which requires VLC, you could create a disk image this way. DVD Imager uses links to create a folder named "lelandtmploc" in /private/tmp for mkisofs to operate on. According to the whether "VIDEO_TS Folder mode" or "Disk copy mode" is selected, DVD Imager then either makes a symbolic link to your dropped VIDEO_TS source folder in the "lelandtmploc" folder, or makes symbolic links for other items from the folder containing your dropped VIDEO_TS folder in the "lelandtmploc" folder then makes a symbolic link to your dropped VIDEO_TS source folder in the "lelandtmploc" folder.
DVD Imager executes the command "mkisofs -f -dvd-video -udf -log-file /tmp/dvdimagerlog -V Volume_Name -o Volume_Name.img /private/tmp/lelandtmploc/"