This video shows how to use the free software package Picasa to generate a photo collage. The duration of the video is approx. 11 minutes. It’s easy and it’s free – why not give it a try. A collage of photos say 16×12 inch can make a great gift if you get it framed or block mounted.
We block-mount by the way 
… €77 for a 16×12 inch delivered to your door. You just email the image and it arrives back to you in the post.
Thanks for that Peter