Mattymx
You can use either photoshop, GIMP or....simply, power point (from Office or Open Office).
Once, two years ago, I had more or less the same...
I used power point...Fixing the "main" picture as a background and placing surrounding some others.
I putted in contact with local fans (in this case was a car - driver) and they gave me a lot of pictures, which I used.
When you have selected the pictures, you can save the power point slide as a *.jpeg file. Simple, easy, quick... isn't?
