What is the feature you would like requested?

Using WotLK 3.3.5 I put this in the addons folder and wow client shows it's enabled. What I don't know is how to actually use this thing? Are there any commands for it to show up? It doesn't show up in Interfaces > Addons. No UI, nothing....

This addon works the same as others. Just place them in the addons folder. You should be greeted with a short message in chat whenever you login too.

However, it sounds like you are not playing on the official servers which are running currently running 3.4.1 based on a modified client closer to retail WoW. That's the only client that's supported.