Hello, Sir:
I'm interested in your requirement.
Let me explain my proposal:
Your presentation, as you explain, can be transformed in a Video, because all would be automatic. Even more, that video can be copied as one .iso file, which can be then easily burned in a CD or DVD, to be used by you, in the way you consider convenient.
I can deliver to you the video file of your artwork presentation, and the .iso file to be burned in a CD or DVD.
In the video, each slide will have a transition, or not if you prefer. And each of them will last 3 min, following your requirements.
Please consider to use a DVD instead of a CD, because a 90 min video in good resolution (1080x720), it's neccesary to have enough space.
I'm not clear about the scaning of art. Are you going to provide this arwork, to be scanned by the freelancer? Using a phisical mai? Of which dimensions are those artworks?