Adds a Theme option to any active theme allowing you to make a child theme.
Extract all files from the ZIP file, making sure to keep the file structure intact, and
then upload it to
/wp-content/plugins/. Then just visit your admin area and activate
the plugin. That's it!
If you have the capability to install themes in your admin, then the themes menu will have a new submenu called "Child Theme". Clicking on this gives you a form that will allow you to create a child theme based on the current active theme.