Trying to hack top rated to display a specific category

In link.class where function top_rated is:

// get all main category

$query = "select category_id from $this- >category_table_name where parent_id=1";
$result = $this->db_connect->Execute($query);
if($result) $total_main_cat = $result->RecordCount();

I've set the parent_id=1 which works in displaying top_rated for cat=1 but it only displays 8 links

I've changed top_rated.php to show over 20 links but this isn't working? what's the problem?

I want to be able to show top 20 links of category 1 with many subcategories

Hart