just to say - all sorted :)

code below incase anyone else needs it

PHP Code:
<?php
$smart_image = (file_exists(DIR_WS_TEMPLATE_IMAGES . 'smartbanners_' . $_GET['cPath'] . '.jpg'))?'_' . $_GET['cPath']:'';
?>
<?php echo zen_image(DIR_WS_TEMPLATE_IMAGES . 'smartbanners' . smart_backgrounds('.jpg', 'sidebox') . $smart_image . '.jpg', '');?></div>
Great mod thank you! I will give it a whirl trying to fit with banner module too - to save FTP'ing new images but that isn't such a big deal :)
Sarah