Very tiny program, LCISOCreator does an excellent job of quickly creating an ISO file from a DVD (or a CD-ROM).
I've paired it with VirtualCloneDrive for a very silent jukebox on a 500GB magnetic disc.
Excellent program to make a CD or DVD backup. It's really small and fast, doesn't need installation and perfect to bring in a USB stick anywhere you might need it.
Of course it doesn't work with copy-protected media, but for a 52KB programm that would be too much to ask.