To prevent unregistered visitors from viewing the enlarged images in your Netfirms Picture Pro gallery, please follow these steps:

1. Using an FTP tool (eg. Filezilla), download a copy of ../nfpicturepro/displayimage.php
2. In displayimage.php search for Local functions definition heading
3. Above the Local functions definition section, add the following line of code:

if (!USER_ID) cpg_die(ERROR, 'You need to register to access this page', __FILE__, __LINE__);

4. Save the changes and upload the revised file back to the server in ../nfpicturepro/

This document is FAQ539.