No, you cannot query for thumbnails and then use the pictureview display type. In your example you are limiting the results to just one, but there could be several thumbnails returned and the script can’t render all them in pictureview.. the pictureview display type is meant for just one picture.
But can’t you use the normal display type and do a custom &galleryPictureTpl with the content of "maxImg"? (minus the template code for next/prev/index links, because those placeholders does not exist in galleryPictureTpl). You can also do a custom &galleryOuterTpl to get rid of the manage button etc.
EDIT: Typo..
"He can have a lollipop any time he wants to. That's what it means to be a programmer."
Thanks very much Doze, that was exactly what I needed to do.