Vista - Vista Photo Printing Wizard

Hi, I have recently gone from XP to Vista,and wish to know how to set up & print multiple images on the one sheet.It seemed so easy in XP,but in vista when i click on an image, it opens in Windows Photo Gallery,then click print/print, I open "How do you want to print your pictures " box.Although i see the templates for different sized prints on the right hand side,how do i then add other photos to the first one and not just multiple prints of that first one.thanks