Karl Geigl is another Fractint enthusiast from the compuserve go graphics forum. We've been chatting via email and he sent me a collection of his formula's and parameter files that I have reproduced here for him. All the thumbnails lead to 1024x768 size versions of the images.
Here is a link to some more of his images.
Karl also supplied the zipfile containing the formula files and the parameter files to recreate these images on your own computer.