Displaying thumbnails of attached images?

Hi,

Sometimes I get emails with image attachments (e.g., photos).  WL displays the
attachments in the original size (usually too big for the screen), and as far as
I can tell there is no way to zoom out in the message buffer.  I also don't seem
to be able to navigate between the attachments when there are many images (the
keybindings p and n do not work reliably), hence sometimes I can't even tell how
many attachments the email contains.  Does anyone have a better way to deal with
image attachments?

Ideally, WL could display attached images as thumbnails.  Image-dired can do
this with images in a directory.  If it's not possible to have thumbnails in the
message buffer (which is in MIME-View mode), perhaps there could be an option to
save all the images to a temporary directory and open it with image-dired?
There you could also mark which ones to save permanently.  In this case, the
message buffer itself wouldn't even need to display the images.

I think better handling of image attachments would be a great improvement for
WL.  Any ideas how it should be done?

All the best,
Greg