Unless you read a message in the thread stating that it didn't work with 3.6.7 - I can almost guarantee that it does work.
It's very easy to install most modifications that are product based. If you take a look at the Instructions in the thread, you'll see that you simply have to upload a few files via FTP, import a Product XML file through the AdminCP, and make a template edit.
It may sound like a lot, but it's really quite simple -- besides it's good to learn how to do it.