I downloaded Juicebox Plugin for Wordpress -- and nothing else. Should I have downloaded something else as well?
You can certainly use WP-Juicebox (the dedicated Juicebox plugin for WordPress) on its own.
Is the Wordpress plugin considered "lite" or "pro"?
WP-Juicebox comes bundled with Juicebox-Lite but if you are a Juicebox-Pro user, you can upgrade the plugin to use your Juicebox-Pro files by following the instructions here.
Do I have JuiceBox Builder with the Wordpress plugin??
No. JuiceboxBuilder-Lite (the desktop application to create and edit Juicebox-Lite galleries) is found inside the Juicebox-Lite zip package which can be downloaded from the link on this web page. (JuiceboxBuilder-Pro is found inside the Juicebox-Pro zip package.)
More information about JuiceboxBuilder can be found in the links below.
JuiceboxBuilder Tour: http://www.juicebox.net/tour/juiceboxbuilder/
JuiceboxBuilder User Guide: http://www.juicebox.net/support/juiceboxbuilder/
... and then copied and pasted the shortcode into our boat PAGE...
This is where the problem lies. A Juicebox gallery shortcode should not be copied and pasted into a different page. Each Gallery Id is linked to the page or post that it was originally created in.
If you copy a shortcode, it might initially display the images attached to the original page but if you edit and update the page, then the gallery will become linked to the new page and will then display the images attached to this new page.
As long as you do not copy and paste gallery shortcodes, everything should be OK.
If you want to recreate a gallery for different pages, you will need to re-upload the images for each page. (Wordpress natively allows each Media Library image to be attached to only one page.)
If you do not want to have to upload images to the Media Library multiple times, then you could perhaps use Flickr as a source of images and use the same Flickr options in each gallery.
We simply wound up with the four photos on the page, not within a slideshow.
Make sure that you do not click 'Insert into post'. This will display the images directly in the page. All that is required to display images in a WP-Juicebox gallery is to attach the images to the post. Just close the media window after uploading is complete.
So, in order to have a slideshow with 4 specific images, the juicebox gallery has to be on a page with NO OTHER IMAGES, otherwise it will incorporate any other images on the page into the slideshow?
A WP-Juicebox gallery sourced by the Media Library will display all images attached to the post. If you want to use Media Library images in the page but outside your Juicebox gallery, then I would recommend that you either use a different image source (such as Flickr) or create your galleries using JuiceboxBuilder and embed them manually using the baseUrl method of embedding documented here (without using WP-Juicebox at all).
Essentially, once you have created a gallery with JuiceboxBuilder, you would upload the complete gallery folder (not just the contents) to your web server and paste the baseUrl embedding code into the body of your WordPress page (ensuring that the method of entry is 'Text' rather than 'Visual'). It does not matter where on your web server you upload your gallery folder to as long as the two paths in the embedding code (the path to the 'juicebox.js' file and the baseUrl itself, pointing towards the gallery folder) are correct.