Like anything else on linux, it's easiest to do things from the command line. Open up a terminal window and type in the following commands

sudo mkdir /media/iso sudo modprobe loop sudo mount filename.iso /media/iso -t iso9660 -o loop

You should be able to navigate to the /media/iso folder and see the contents of the ISO image. If you want to unmount the iso, use the following command:

sudo umount /media/iso

Stay tuned, we'll post a howto about using these ISO images from within the GUI.