You can use queryposts to sort your reviews by the meta value of the overall score "meta_key=field_name&orderby=meta_value" by default should list high to low, field_name = the custom field key name where the overall score is, or whatever you want to orderby.
Very cool score counting effects and good work
__________________
~Jerry Fritz
I write top quality porn reviews, articles, press releases, and other content at fair rates.
Three years of experience writing for adult audiences is at your disposal. I will find sites, get passes, and take care of all of the leg work.
Email: [email protected], please put in subject "GFY" to get past spam wall.
(US-born and raised, BA in English with Honors, I also write for mainstream sites)