[Plugin: jQuery Lightbox For Native Galleries] Possible to use "large" images instead of f

The lightbox is loading the full size image, but I’d love for it to grab the “Large” version (whose size is set in Settings > Media) of the image instead. I have a client who is uploading photos directly off their digital camera, so the images are loading very slowly since they’re 5-6 MB each.

http://wordpress.org/extend/plugins/jquery-lightbox-for-native-galleries/