The following tool for Windows XP allows image files to be
mounted virtually as CD-ROM devices. This tool is provided here for
your convenience, and is unsupported by Microsoft Product Support
Services.
(Via Mike Gunderloy on
win_tech_off_topic - this tool is pointed to on the
MSDN subscriptions FAQ page - click on "What are ISO image
files and how do I use them?" and the link is near the bottom of
that section.)