Link image to page

You may refer to the link below to link NextGEN gallery images to individual page.

http://www.ombuconsulting.com/how-to-link-nextgen-gallery-images-to-an-individual-page-or-post-in-wordpress/

easily add the link-attribute to the singlepic-shortcode…

example:
[singlepic id=xxx link=http://www.your-external-website.com]

After i had a look at the code i don’t think that it’s possible…
You can see it at the following file wp-content/plugins/nextgen-gallery/lib/shortcodes.php.
In the function show_singlepic you can see the shortcode attribute “link”, but in the other functions is nothing like that.