1. Backup your "WTF" and "Interface" folders.
2. Extract the "WTF" "Interface" and "Fonts" folder from Quenios UI.zip into your WoW directory.
4. In the WTF folder, rename the following folders to match your information: YourAccountName, YourRealmName and YourCharacterName.
5. Log in to the game. Type "/reflux switch Quenios UI" (without quotation marks) this is case sensitive. After you've typed in this command, do a /reload to make sure everything loads properly.