I really quite like the concepts employed in this type of virtualCD program. Have the virtual drives only mounted when a file is actually mounted. Unmount the image (and drive) with a simple 'eject'.
This program has significant potential and I would really quite like to see advancements on it to fix some of the bugs while keeping everything simple as possible (too many virtual drive apps are laden down with unnecessary excesses).
Great job and I look forward to new releases!