[wp-hackers] Images attached to posts/pages?

[Bryan Harley]

Can someone explain the concept of how an image (when uploaded via the
"Edit Post" or "Edit Page" pages) becomes attached to said post or
page?

If I were to go to the "About" page and upload 4 images from the image
uploader and not insert any of these into my post body... those 4
images are still associated will that page, correct?

Is there any way to pull these images via PHP?  Is there a template or
reference tag?  I can use the [gallery] shortcode, but what if I
wanted the images displayed in a lightbox gallery for example?