Magento: Add customer group to pdf packing slip -

i trying add customer's group pdf packing slips. assuming should done in sales/model/order/pdf/abstract.php, put where?

thanks

ok, here did. put following code - wrote:

/* add customer type invoice */ $write = mage::getsingleton('core/resource')->getconnection('core_write'); $readresult=$write->query("select customer_id `sales_order` increment_id = ".$order->getincrementid()." limit 0,1;"); $row = $readresult->fetch(); $customerid = $row['customer_id']; $myroleid = 1;  if (!empty($customerid)) {     $write = mage::getsingleton('core/resource')->getconnection('core_write');     $readresult=$write->query("select group_id `customer_entity` entity_id = ".$customerid." limit 0,1;");     $row = $readresult->fetch();     $myroleid = $row['group_id']; }  switch ($myroleid){ case 2: $grouptitle = 'wholesaler invoice';   break; case 3: $grouptitle = 'retailer invoice';   break; case 4: $grouptitle = 'dealer invoice';   break; default: $grouptitle = 'customer invoice';   break; }  $page->drawtext($grouptitle, 480, 780, 'utf-8');     /* end add customer type */      

immediately after block of code existed:

/* add head */ $this->insertorder($page, $order, mage::getstoreconfigflag(self::xml_path_sales_pdf_invoice_put_order_id, $order->getstoreid()));  $page->setfillcolor(new zend_pdf_color_grayscale(1)); $this->_setfontregular($page); $page->drawtext(mage::helper('sales')->__('invoice # ') . $invoice->getincrementid(), 35, 780, 'utf-8'); 

in app\code\local\mage\sales\model\order\pdf\invoice.php file