When on the photos part of the form and ready to upload:
- Click on the Add your photo button
- On the next screen click the browse button
- This will open a file upload window
- In the "look in" drop-down at the top make sure you select desktop
- Locate the file you want to upload and click on open
- A preview of your photo should appear, if you are happy this is the right image, click continue
Do this for each of your 3 or 4 photos.
Be patient with photo uploads. It will take between 30 seconds and 2 minutes to upload each photo of average size. If it's longer than that try a different photo.