How do I make a picture collage?

A while back, I posted a collage of photos and was asked how I did it, so here it goes.

Now, there are obviously many ways to do it, especially if you have a photo software package (e.g. Photoshop), but if you don't, there's still a way. If you are a blogger, then you are probably already familiar with Picasa, Google's photo organization software. It doesn't have tons of options, but it provides the basics, one of which is making a collage.

1. To make a collage, first you have to have Picasa downloaded on your computer (which is free from Google).
2. Then download your photos into Picasa.
3. Choose the photos you want to use in the collage by pressing "Ctrl" and selecting the desired photos with your mouse.
4. Click the "Collage" icon on the bottom of the Picasa screen. There are a couple of types of collages you can make. The square collage with lots of pictures does require a squared number (yes, this is painfully obvious, but worth making note of), although, if you only choose 12 photos (instead of 16 for instance), it will still make the collage but there will be 4 repeated pics.
5. There you have it, you've got a collage.

And now it's time to collage-ify.