at least you got it to install without errors

in admin at the bottom of configuration there is no lightbox listed?

am lost on that one unless your theme lightbox files are not in their designated theme folder

check to make sure that you put the:
includes/languages/english/extra_definitions/make a folder for your theme here and place that file in it

same for the modules/your theme folder
and the templates/your theme folder

put those files from the zip into the folders and then check admin again either in a new page or refreshing the page you have open

let us know