I have a lightbox which currently if I click on image 1 it shows an image in a subfolder (same image as the thumbnail but high res). I would like to add other images of the item in the subfolder and when the user clicks the next button it cycles through the images in this subfolder.

I have set up rel="gallery[gallery1]" on the first image, rel="gallery[gallery2]" on the second which has segregated the images from cycling through all the thumbnails on screen but it now only shows the 1 image, it won't cycle through the other images in that subfolder.  Is this possible to achieve?  Do I need to specify a path or something in the rel? 

Thanks

Garry