To install download the zip file and expand it. It contains a folder called presets. Inside the folder is the template bundle, Button-Maker.txt. Drag that file over the green bundle button on a blank Generico template settings page. The fields on the page should fill out. After you save the page, the template will be available from the Generico icon on the Atto html editor.
This template can also be used with PoodLL 3.