Sorry for the delayed response. And I apologise for the website, its now hosted on a very basic server that isn't as reliable as it used to be. We are working on it!
The new Live Template does not use generated previews, it instead uses a more intelligent lightbox plugin that loads the full size image and scales it to the browser. I decided this was better now that internet connections are faster. It can even use the full size image as thumbnails but I would recommend still generating thumbnails as multiple connections puts load on HFS.
You would have to do some programming to get it using your ToG generated previews.
