[themes] Overriding zone etc. templates for specific content types in D7

Is there a template hint for overriding a zone template for a specific content type, such as a content zone template for product display, or do I need to create one in template.php? -- --- drupal.org/user/367108 linkedin.com/in/jeffrgreenberg accidentalcoder.com / ayendesigns.com @accidentalcoder