Alcohol 120% (http://www.alcohol-soft.com/) is a little bit better, not only can it mount images but it can also make ISO's and burn them to! It also has support for the major protection schemes, so you can copy whatever you have. I think it can even do PS disks, never tried it with PS disks before though.
It also has a GUI which will keep track of all the images you mount so you can easily mount them later with the click of a button .