> I'm trying to download all of the full size images
> from the hubble.org gallery
> (http://hubblesite.org/gallery/album/entire/npp/all/
> ) (that is, I want to grab
> <http://imgsrc.hubblesite.org/hu/db/images/hs-1994-02>
> -c-full_jpg.jpg instead of
> <http://imgsrc.hubblesite.org/hu/db/images/hs-1994-02>
> -c-small_web.jpg or

The first url is the table of contents. Each image has its own page:
<http://hubblesite.org/gallery/album/entire/pr1994002c/npp/all/>
which has the links to different image flavors:
<http://imgsrc.hubblesite.org/hu/db/images/hs-1994-02-c-full_jpg.jpg>

The default is for httrack to go down only but
/gallery/album/entire/pr1994002c is not down from
/gallery/album/entire/npp/all

> +hubblesite.org/*.htm*
trailing * not needed and filter won't work since the individual pages do not
have any extentions.
> +*.hubblesite.org/*full_jpg.jpg

Try: -* +*/entire/* +*full_jpg.jpg

Also note, the images at the bottom of the page do not follow the pattern.
Probably want to add: +*-f-large_web.jpg +*-f-web_print.jpg