As you know, konqueror generates thumbnails for some types of files like
images and video. Is there a way to save such thumbnails when toasting a
data CD or DVD?

Currently when toasting a dir of say, images, and browsing it with
konqueror, it generates the thumbnails anew, which is quite slow on an
optical medium. I wonder if it could be possible to save the thumbnails
(hidden dir or something) in a way konqueror could read them directly from
the CD, not resizing every image.