Add alt to Store images

Hi,

I am trying to add alt tags to the store images for all of my coupons and I want them to reflect the name of the store they belong to.

After some research I found that this file needs to be edited:

wp-content/themes/CP/framework/class/class_shortcodes.php and more specifically this section:

=============================================================================
[IMAGE] – SHORTCODE
========================================================================== */
function wlt_shortcode_image( $atts, $content = null ) {

global $userdata, $CORE, $post;
extract( shortcode_atts( array(‘text’ => “”, ‘link’ => 1, “gallery” => 0 ), $atts ) );

$image = “”; $text = $text; $link = esc_attr($link); $gallery = esc_attr($gallery); $permalink = get_permalink($post->ID);
if ( has_post_thumbnail() ) {

if(isset($GLOBALS[‘flag-single’])){
$image .= hook_image_display(get_the_post_thumbnail($post->ID, ‘full’, array(‘class’=> “img-polaroid”)));
}else{
$image = ‘‘;
$image .= hook_image_display(get_the_post_thumbnail($post->ID, array(get_option(‘thumbnail_size_w’),get_option(‘thumbnail_size_h’)), array(‘class’=> “img-polaroid”)));
$image .= $this->STICKER($post->ID);
if(strlen($text) > 1){ $image .= “<span class=’ftext’>”.$text.”</span>”; }
$image .= ‘‘;
}

}else{
// CHECK FOR FALLBACK IMAGE
$fimage = hook_fallback_image_display($this->FALLBACK_IMAGE($post->ID));

if($fimage !=””){
if(isset($GLOBALS[‘flag-single’])){

if(isset($GLOBALS[‘CORE_THEME’][‘listing’][‘fallback’]) && $GLOBALS[‘CORE_THEME’][‘listing’][‘fallback’] == ‘1’){
$image .= $fimage;
$image .= $this->STICKER($post->ID);
if(strlen($text) > 1){ $image .= “<span class=’ftext’>”.$text.”</span>”; }
}else{

$image = “”;
}
}else{
$image = ‘‘;
$image .= $fimage;
$image .= $this->STICKER($post->ID);
if(strlen($text) > 1){ $image .= “<span class=’ftext’>”.$text.”</span>”; }
$image .= ‘‘;
}
}
}
// REMOVE FIXED WIDTH/HEIGHT VALUES
$image = preg_replace( ‘/(width|height)=”\d*”\s/’, “”, $image );

// REMOVE LINK
if($link == 0){
$image = “<span class=’frame’>”.preg_replace(“/<a[^>]*>(.*)<\/a>/iU”, “$1″, $image).”</span>”;
}
// ADD ON POP-UP GALLERY
if($gallery){

preg_match( ‘@src=”([^”]+)”@’ , $image , $match );

$image = ““.preg_replace(“/<a[^>]*>(.*)<\/a>/iU”, “$1″, $image).”“;
// NOW ADDON EXTRA GALLERY IMAGES AS HIDDEN VALUES
$images = $user_attachments = $this->UPLOAD_GET($post->ID,0,array(‘type’ => ‘image’));
if(is_array($images) && !empty($images)){
foreach($images as $nimg){
$image .= ““;
}
}

$image .= ‘<script>jQuery(window).load(function(){jQuery(“a[rel^=\’prettyPhoto\’]”).prettyPhoto({animation_speed: “normal”, autoplay_slideshow: true, slideshow: 3000 });});</script>’;
}

// RETURN VALUE
return hook_shortcode_image_output($image);
}

Can anyobody advice me on where in the code I add the alt tag to reflect the category name as the image alt tag?

Many thanks!