On my Windows machine I was able to use a program called VirtualDrive http://www.farstone.com/software/virtualdrive.htm to create a master catalog of all my game and application CDs... this way I did not have to insert them each time they were required for a game... and if I lost a CD or the CD was damaged I wasn't out of luck. This also made reinstalling/rebuilding machines faster as I could just mount CD images as a file on the hard disk and get lightning quick read times... The best I've been able to do on the Mac is create a .cdr using Disk Utility and mount it... however applications don't treat the mounted image as a CD-ROM... is this something that you can do on the Mac, even by purchasing software? Thanks! P.S. This is not to get around copyright protection or for illegal sharing... this is just to make my life easier with managing dozens and dozens of CDs... plus it's something you can do in Windows so you have to be able to do it on the Mac, right??