public function install()
    {
        $this->_clearCache('*');

        if (!parent::install()
            || !$this->registerHook('header')
            || !$this->registerHook('leftColumn')
            || !$this->registerHook('actionOrderStatusPostUpdate')
            || !$this->registerHook('addproduct')
            || !$this->registerHook('updateproduct')
            || !$this->registerHook('deleteproduct')
            || !$this->registerHook('displayHomeTab')
            || !$this->registerHook('displayHomeTabContent')
            [B]|| !$this->registerHook('aftercategory')[/B]
            || !ProductSale::fillProductSales()
        )
            return false;

        Configuration::updateValue('PS_BLOCK_BESTSELLERS_TO_DISPLAY', 10);

        return true;
    }