How to add user comments from OneStepCheckout extension to printing order pages in Magento

/*
** How to add user comments from OneStepCheckout extension to printing order pages
**   more info at: http://mandagreen.com/adding-customer-comments-invoice-pdf-magento/
**
** 1. Place the function _insertOscComments as is, into the Abstract.php file
** 2. Add the function call to the end of insertTotals function
*/

// Will create a box with the user comments
protected function _insertOscComments(&$page, $order) {

    $START_LINE1 = 145;
    $START_LINE2 = $START_LINE1 * 2;
    $START_LINE3 = $START_LINE1 * 3;

    $BOX_1LINE = 40;
    $BOX_2LINES = 60;
    $BOX_3LINES = 75;

    $commentTitle = Mage::helper('onestepcheckout')->__('Customer Comments');
    $commentMsg = Mage::helper('onestepcheckout')->__('No Comments Added'); //"Ingen kommentarer";
    $commentMsgLine1 = '';
    $commentMsgLine2 = '';
    $commentMsgLine3 = '';

    if( !$order->getOnestepcheckoutCustomercomment() ) {
        // by pass if no comment was added
        // return;
    }
    else {
        $commentMsg = preg_replace('/\r\n/', ' ', $order->getOnestepcheckoutCustomercomment());
    }

    /* Box height */
    $BOX_HEIGHT = $BOX_1LINE;
    if(strlen($commentMsg) > $START_LINE1 && strlen($commentMsg) <= $START_LINE2) $BOX_HEIGHT = $BOX_2LINES;
    if(strlen($commentMsg) > $START_LINE2) $BOX_HEIGHT = $BOX_3LINES;

    /* Normal parameters */
    $this->y -= 20;
    $page->setFillColor(new Zend_Pdf_Color_Rgb(0.93, 0.92, 0.92));
    $page->setLineColor(new Zend_Pdf_Color_GrayScale(0.5));
    $page->setLineWidth(0.5);
    $page->drawRectangle(25, $this->y, 570, $this->y - 20);
    $page->setFillColor(new Zend_Pdf_Color_Rgb(1, 1, 1));
    $page->drawRectangle(25, $this->y - 20, 570, $this->y - $BOX_HEIGHT); // 1 line = 40, 2 lines = 60, 3 lines = 75
    $page->setFillColor(new Zend_Pdf_Color_RGB(0.1, 0.1, 0.1));
    $page->drawText($commentTitle, 35, $this->y - 13, 'UTF-8');

    /* divide comment up to 3 lines */
    if(strlen($commentMsg) <= $START_LINE1) {
        $commentMsgLine1 = $commentMsg;

        $page->drawText($commentMsgLine1, 33, $this->y - 33, 'UTF-8');
        $this->y -= 50;
    }
    else if(strlen($commentMsg) > $START_LINE1 && strlen($commentMsg) <= $START_LINE2) {
        $commentMsgLine1 = substr($commentMsg, 0, $START_LINE1);
        $commentMsgLine2 = substr($commentMsg, $START_LINE1);

        $page->drawText($commentMsgLine1, 33, $this->y - 33, 'UTF-8');
        $page->drawText($commentMsgLine2, 33, $this->y - 48, 'UTF-8');
        $this->y -= 70;
    }
    else if(strlen($commentMsg) > $START_LINE2) {
        $commentMsgLine1 = substr($commentMsg, 0, $START_LINE1);
        $commentMsgLine2 = substr($commentMsg, $START_LINE1, $START_LINE1);
        $commentMsgLine3 = substr($commentMsg, $START_LINE2);

        $page->drawText($commentMsgLine1, 33, $this->y - 33, 'UTF-8');
        $page->drawText($commentMsgLine2, 33, $this->y - 48, 'UTF-8');
        $page->drawText($commentMsgLine3, 33, $this->y - 63, 'UTF-8');
        $this->y -= 95;
    }
}

/*
**  At the end of insertTotals($page, $source) method you will see:
*/

    $page = $this->drawLineBlocks($page, array($lineBlock));
        return $page;

/*
**  Change that line into
*/

        $page = $this->drawLineBlocks($page, array($lineBlock));

    /* Add OneStepCheckout Customer Comments */
    $this->_insertOscComments($page, $order);

        return $page;