Is it possible to customize the default thumbnail/icon listing view or create a similar grid-style result view?

The minimal thing I'd like to do is add additional properties to the thumbnail results view when searching Pictures. Currently only shows thumbnail, title, contributor, and file size and I'd like to display other EXIF and IPTC metadata for each item.

Ideally I'd also like to be able to use the iptc:caption or dc:description as the image tooltip.

I'm assuming I'll need something like an XML Extension to override the listingThumbnail layout and/or a custom layout_listing_thumbnail_template.xhtml, but not really sure where to start with those.