I have a newer iMac without an optical drive and some DVDs that I needed to run software off of. This software will have you juggle discs to read data off of them, and the data can't simply be copied to the machine's drive.

I used a windows machine to make ISOs of these DVDs. And the first disc, the installer, it will mount in VMware and let you install the software. It then asks for the other discs, and these won't mount as ISOs. If I mount them as drive images, they'll show up on the iMac's and I have access to all the files. But if I try to mount them as the dvd drive through Fusion, nothing happens. For that matter, I'm unable to attempt it a second time, as Fusion believes that the there is already an iso mounted as the dvd, while nothing has happened as far as the guest OS is concerned. drutil eject will allow me to eject the ghost/non-existent dvd, at which point I can make a second (equally futile) attempt.

Does anyone have an explanation for this behavior? How can the ISO be valid enough to mount as a drive image, but not valid enough for Fusion to mount it as if it were a dvd?