Creating virtual file for game cd?

[alosadone]

I'm currently running OSX 10.6.3 on a Macbook Pro and want to create a backup CD for Sims3.

I've had problems before where the CD gets to the point that's it covered in scratches so I've generally created and run ISOs on the PC, but I'm not sure how to create a usable image on the Mac.

 

[iAlexG]

You can create a disk image in Disk Utility to match the name of the Sims 3 disk but it doesnt always work.