Need jQuery type Scroller Thumb Gallery

That’s not a WordPress site as far as I can tell.

https://speckyboy.com/2009/06/03/15-amazing-jquery-image-galleryslideshow-plugins-and-tutorials/

Some ideas to help you.

So far the best solution is jAlbum to create a Galleria. Nothing that would work from within WordPress yet.

Maybe have a look at NextGen Gallery plugin for WordPress, that will allow your clioent to upload photos and put them into galleries and albums.

You will then need to find additional plugins for NextGen to get the galleries displayed in a nicer way

Mentalist3D

Awesome! Working here:
https://cmsdabbler.com/wordpress/nextgen-w-gallery-plugin/

Any tips on how to get the thumbs to scroll on mouseover instead of click?

Sorry I have never used the gallery plugin before, if there is nothing in the options I reckon you will have to edit the plugin files. It should be a case of changing trigger events such as onclick to mouseover.

I would look for the piece of code that triggers the on_click event and post it here, to see if anyone can give you the correct code for the mouseover event.