Photoshop offers two features for printing multiple images on a page: Contact Sheet II and Picture Package. Both are available from the File Browser Automate menu (Photoshop CS) or from the File > Automate submenu (Photoshop 5.5 and up). Many people are confused about when to use Contact Sheet II and when to use Picture Package.
Use Contact Sheet II if you want...
all the images the same size, or
every image to be unique, or
to print the file name below the image.
Use Printer Package if you want ...
to mix different sizes of images on the same page, or
multiple copies of the same image, or
to mix different sizes and different images, or
a text overlay printed on the image (can include custom text, filename, description, copyright, credit, or title).