There are lots of jQuery based lighbox systems out there. I'd try to find one of them that suits your needs. Most are pretty simple to set up. Toughest part will be setting up the HTML in FileMaker.
Wow quick response! Thanks!!!
I know nothing about jQuery lightbox systems. Can you point me in the right direction?
Google it. Especially jQuery. There are so many out there to choose from. Another thing to look at might be one of the web authoring apps - Rapidweaver and Coda on the Mac are quick and have some of these things built in. You'd be able to create a system really quickly, export the code and pull the HTML into FileMaker for a webviewer.