"Users have the ability to assign a small image (an avatar) to their user account.
After a user selects/uploads an avatar,
the image will be displayed next to every message the user posts on the forum."

The process is simple...

1) In the upper right-hand corner click on the "forum" icon.

2) Then in the menu bar click on "Private Messages"

3) Scroll down on the left and/or click on "Edit Avatar"

Option 1 - Enter the URL to the Image on Another Website:
Option 2 - Upload Image From Your Computer:

I suggest Option 2. This will store the avatar image on the carproforum.com for future use.

Note: The maximum size of your custom image is 250 by 250 pixels or 1.91 MB (whichever is smaller).