Adding image title in NextGen Gallery

Hi,

I’d like to add the title of each images on the gallery.php.

I tried to modify the template: gallery.php by adding:

echo "$image->alttext";

I have selected gallery.php on the menu NextGEN Basic Thumbnails.
It didn’t work, nothing change at all.

I read on another topic that I had to create an other template with this change. The template does not appear in the list.

If someone could explain to me where should i put my new template to make it appear in the list i would be grateful.

Sorry if you see any english mistake, english is not my native english.