if you look in the theme-demo here http://www.kriesi.at/themes/choices/template-files/gallery/#!prettyPhoto there's a gallery created with the default wo shortcode. I created mine using id="..." to recover images from another post but then clicking on the image would open a link to he single media page, and not the lightbox as the theme demo does.
Then, the image size can be set to small,large.full,medium,thumbnail and in settings -> Media you can choose the default thumb sizes, hence being able to resize the gallery images,,, but it doesn't work! the largest they get is in thumb mode and i can't get them to display bigger,,,
The page is this one http://jeliuc.org/wp/blog/2012/11/15/sorgenia-articolo/#!prettyPhoto
NOTE: now the image link to another page because i used the WP Gallery Custom Links to override the normal links. I tried including the link to make the lightbox appear throught this plugin and it seems to work, but for some reason it duplicates the image placing a copy under the original in the gallery.. (am I just writing the code for the link incorrectly?)
I would like to be able to make a gallery like the one in the demo appear, so if you have any clue on how to show the lightbox in clicking on the gallery thumbs or resizing those thumbs would be appreciated!