So I was wondering what the easiest and best way to save dumped images was.
When people dump images via imagebam (showing thumbnails with links to galleries) I found a useful firefox Add-on,
https://addons.mozilla.org/en-US/firefox/addon/12249
This Add-on also works for many other sites
If images are dumped into a thread from different hosting site, then you can use the DownThemAll Add-on.
https://addons.mozilla.org/en-US/firefox/addon/201
This can save all embedded images on the page.
EDIT: There is an Anti-container Add-on specifically for the DownThemAll Add-on.
With both of these running you are able to sweep up all the images in a thread. Including images from Imagebam, and it will download the full sized image file and not the smaller version.
https://addons.mozilla.org/en-US/firefox/addon/12577