Hi Nick136, welcome to the WD Community. See if the following links help.
http://community.wd.com/t5/WD-TV-Live-Streaming/Theme-IMDB-Rating/m-p/630167/highlight/true#M24995
http://community.wd.com/t5/WD-TV-Live-Streaming/New-to-themes-advice-please/m-p/593379#M23194