For commonly asked questions pertaining to cd-images and what to do with them please visit http://forums.afterdawn.com/thread_view.cfm/7976 . There is also a fairly straightfoward description of some of the major formats available at http://www.hazza.dsl.pipex.com/faq.htm#CDs
Also because it depends upon the application you use. You can do .CUE/.BIN, .MDF/.MDS, .CCD/.IMG/.SUB .BWA/.BWI/.BWT.... Maybe some protected CD needs a complex software, but who knows?.... _X_X_X_X_X_[small]Read forum rules! http://forums.afterdawn.com/thread_view.cfm/2487[/small]