I'd stick to by designer and just tag your template with the number of photos
The house one is in my halloween folder, the others are in # photos
I have all my templates in folders by designer and then have them tagged in ACDSee by the number of photos, and also if it's a 1 page template or 2 page template. On kits like this by Cindy and Megan I do actually split the kit and put the kit in Megan's folder and the template in Cindy's folder just because that's how I scrap. Templates are the only thing I ever pull out of a kit.
I don't tag anythign as I have never really figured out how to do it!!!![]()