After learning that Virtual PC only mounts ISO images that are smaller than approximately 2.5 GB I needed to mount an ISO off MSDN without burning it. I know there are tools like Daemon-Tools which are free but start installing search bars at the same time… So a little searching dug up a Microsoft tool which will mount any ISO image. The best part is the file is only 60kb and there is nothing to install. The directions are included in the archive file. Note this is an upsuported tool from Microsoft so use at your own risk. I used it to mount 3 ISO images this morning and it worked just fine, neat tool. You can download the file below.

Windows XP Virtual CD