Lightbox & XML (Disable image by name)

Dear All,
I have on my index page content loading from xml file. I load separately
text and images (each one to different column). BUT to load only text
I HAVE to load also white picture otherwise xml doesn’t load text.
So white picture is like “system” image.

the problem is when I want hire lightbox, it recognises also white images
and change mouse arrow to hand when the mouse is over the image.
I would like it behave rather like src then href.

the second problem is when I play grouped slideshow, the white images
also are shown up.

the question is:

how to disable particular file from being recognised as image by lightbox.
I have tried many things with xml, but nothing helped.

I would be very grateful for any any help

thanks

macmac
my testing page is:
http://www.lubocki.com/tvar3.html