Nextgen and WP-Greet

I am using an HTML site to call a WordPress site to send ecards. I am using nextgen and wp-greet on that site. From the html site the user choose a card and click send this card, He is been transfer to the wp-greet section on the wordpress site.
As you see on the picture at: http://docden.net/ I don’t want the thumbnails ( all other cards I got) at the bottom of the sending form. How can I remove those thumbnails not to be display …