Hi NJV20
I suppose you could accomplish it using DHTML and Positioned
Text Boxes (shudder).
You might consider one of the following approaches.
1. Just above the image, insert a line of text advising the
user to click areas of the image below for more information. Then
have alternative text that appears when they mouse over.
2. You could use Adobe Captivate to accomplish this.
Hopefully you will find something you are comfortable with...
Rick