Large pics on html pages - Need Mac program to automate the workflow

[Simon]

We're going to be offering the option on our hosted free sites to have the large photos opening on their own html page, which means that now we need 20 or 30 html pages in addition to the usual 4 free site pages we have.

I was hoping that automating the process of creating those pages would be easy, but Photoshop doesn't seem to have an option to make the html pages without the extra navigation stuff it adds to each page.

So now I'm looking for a simple program that runs on the Macintosh platform, and which can take a folder of 20 or 30 full-size photos and make one html page for each photo. Are there some free site builders here who use a Mac and can suggest something for this?

Simon