I see there have been some answers, mostly relative to how to save individual images.  But to your original question of "all the pictures on this thread" there is another way to quickly and easily get everything in a thread here, and it works for many other "places" you look at "on the web" too.  Instead of going after each individual photo by right clicking "save image", instead when you right-click pick "print".  Then when the print dialog comes up change the printer selection to "Save as PDF".  If you do that here on forwardlook.net you will capture the entire thread, all the text and all the photos into one PDF file that you can save on your computer.  This can be very handy when someone has posted a "how to replace your framiscratchit" and illustrated the instructions with photos.  You just save the whole thing as a pdf and you have a nice selfcontained document with all the explanstions and photos in it.  If you give it a meaningful name, like "replace 60 dodge frasiscratchit" you will be able to easily find it later.

You can pick and choose what pages you want to include before you click "save".