How to Mount ISO, CUE, MDS, NRG Files in Windows 7
Not every piece of software that works on Windows XP or Vista will work on Windows 7. Mounting ISO files can be particularly difficult if you’ve been using Daemon Tools to do it so far.
Until Daemon Tools shows up with a version that will work on Windows 7, you can use PowerISO to mount ISO, nrg, mdf and a few other types of image files. PowerISO is freeware so there shouldn’t be any problem. Its only limitations is the screen that asks you to register it and a limit of 300Mb when creating or editing files. Mounting files doesn’t come with limitations however.
Update: there is now a Daemon Tools version that works on Windows 7.