What I’d like to know…is there any way that the lightbox can contain text (whether from another file or page, or inserted in the code) and/or a form?
I know there are some plugins available, but I’m not having much success getting them working well, and I’d rather stick to using what is contained within X.
Although the lightbox is not design for that, you could load a page in it…You can create a page without header and footer and set the href with the lightbox selector to open that page.
My other suggestion would be to use convertplug which I believe is better for that.