Hi,
A lightbox feature is going to be released in version 2.3.0. This release is still some time in the future, so in the mean time you could try to apply a lightbox by following the instructions in this thread. Please keep in mind that updating the plugin will cause your changes to disappear.
I don’t think you’ll be able to show the title and description on a lightbox at the moment, but they will be in the lightbox that comes with the slideshow’s release of version 2.3.0.
Best regards,
Stefan