Go to configuration > company there is a template provided for you with N style labels, copy it and add it to the custom label box, save it, when you...
Go into the category manager> properties tab (first) its probably not the template but the page layout setting below that, category and product page...
Can't be sure, as we have been doing other things as well.
We do have listings without reviews that rank high than some with (similar products), but...