Yesterday I installed Windows 7 beta 1 on the laptop which I use for training.
My employer provided me the Visual Studio installation CD as an ISO image, but when I got to the stage of installing it, I discovered that none of my regular ISO mounting tools (like DEAMON Tools) worked on Windows 7.
Fortunately, I found this small, non-intrusive and free mounting tool called Prismo File Mount. It installed in a second, and is really easy to use.
Using “Quick mount” on the ISO file transformed it into a browsable directory from which I could install Visual Studio, similar to the Compressed Folders shell extension for zip files built into Windows Explorer.
Using the “Mount…” option, it is possible to map the image as a drive, if desired.
UPDATE: Prismo File Mount does not work for 64-bit editions of Windows 7. MagicDisc is a good free alternative in case you are running 64-bit Windows 7.