I think you might be talking about BetterHTMLExport from droolingcat.com - I made this gallery using it. You can look to see if that looks like what you are after. It was 'sold' to geeksrus.com and costs $20.
Lately, I have been using Daniel Staudigel's WebExport which is free and offers a lot of options as to styles including a no-brainer Flash template. I made this gallery with WebExport Flash template and believe me I do not know Flash programming,
Both options operate as iPhoto plugins and after installations appear in the iPhoto Export... panel.