Lightbox involves a lot of code and uses jQuery, you can download load it and try it out, it doesn't even have to be on a server to use it, it can be used on files in your own machine. It's also complicated and fussy, and doesn't play very well with other things on a page.
Welcome to http://www.myphotowizard.net
where you can edit images, make a photo calendar, add text to images, and do much more.
When you know what you're doing it's called Engineering, when you don't know, it's called Research and Development. And you can always charge more for Research and Development.