[Plugin: WP e-Commerce Related Products] Related Products (Pull from Child Category)

yeah you can, modify “wpec-related-products.php”. Change this script:

// cat in array
        foreach ($product_cat as $cat_item) {
            $cat_array_name_list[] = $cat_item->slug;
        }

with this:

// cat in array
        foreach ($product_cat as $cat_item) {
            if($cat_item->parent != 0)
            $cat_array_name_list[] = $cat_item->slug;
        }