In Paintshop Pro:
First, you need to find out the size for your picture.
Let's say your MySpace page is 800 x 600.
In Paintshop Pro create a new image 800 x 600 pixels. The background color doesn't matter.
Now, in PSPro, open all of the photos you want to include.
Left click on one of them to bring the focus to that picture, right click on it and select COPY.
Now, go back to your 800x600 blank image , left click on it for focus, and then right click and select "PASTE AS NEW SELECTION".
This will paste the smaller image into your 800x600 image and the small photo will be selected so you can move it around and place it where you like.
Repeat the same for all the photos and when finished, save your picture as a JPG, GIF, or BMP.