So I have discovered at my Uni we have some giant large format printers. I'm talking big big! I've been having a great time printing off some poster sized shots of my photos at less than cost price but I was wondering if anyone had any tips for what I next want to achieve. For a project I have going on I need 40 6x4s printed. Does anyone know a way to take 40 PSD files and quickly and easily collated them into one image then print them on a large format printer? It would save a lot of time and paper rather than printing them all individually and then I would be able to cut them out on the guillotine. I suppose I am looking for some sort of "collage" filter/function. Does anyone have any tips?