Need a second thumbnail size

Hello –

(Using the latest WP+NextGen and not having any errors or problems with my server setup, hosting, or anything else… 😉 yay!)

We’d like to be able to generate one (or more) additional sizes of thumbnails for every image uploaded via NextGen. I’m wondering if there’s a NGG hook that I can use so that I can create a function that does this whenever the create thumbnail script fires (and I could do this in functions.php so rather than edit any core NGG files). Also, if you could point me to where the thumbnail creation code is and give me any useful examples or pointers, that would be great.

Thanks in advance for your help!

http://wordpress.org/plugins/nextgen-gallery/