print.css and nextgen thumbnails

What do I need to add to the print.css file to prevent it from displaying image url’s next to each nextgen thumbnail?

I’ve used this guide to set up wp-print and nextgen to work together as they should and it worked amazing

http://it.megocollector.com/?p=1159

but the usual way people print (File>print) still displays nextgen thumbnails with links and with break row after each image.

Or, in worst case, how can I remove nextgen thumbnails from print completely?