Plugin to add a lightbox only to chosen post images or by custom post type

Is there a plugin which can make an image in a post use a lightbox (or similar), the only plugins I have found so far will add a lightbox to images in all posts, I want to be able to choose by each individual post what images to add to a lightbox or to be able define a lightbox by a custom post type (im using WP 3.0).

Thanks