There is an undocumented feature with the current build of PhotoPost which lets you turn off featured photos for everything except the index page. This will be rolled into the next update, but for now if you are running the latest build with the updated pp-inc.php, at line 183:
// Undocumented switches to put included in next update
$Globals['catcache'] = "yes";
$Globals['features'] = "yes";
$Globals['quickopts'] = "yes";
Set the features line to "no".
Please do not PM me for support or sales questions. Thank you for your understanding.