It's very easy to get an Avatar (the little picture under your name).
First off you'll need a picture that you want.
Step 1, Resize or crop your image to 120x120 pixels.
Then you will need somewhere like imageshack to 'host' the picture for you.
See here on how to host the picture at Imageshack .... viewtopic.php?f=6&t=58620
Step 2, In Imageshack, highlight the "Direct link to image" address/URL, and then right click and copy.
Step 3, In another browser window (or tab) go to http://www.wrx.com.au/forum/ucp.php?i=p ... ode=avatar
Where it says "Link off-site", paste the previously copied "Direct link to image" in.
Click on Submit and the avatar should be applied and shown.
Follow those steps and your avatar should work. Remember to keep your avatar to a max size of 120x120 pixels, and try and keep the file size as small as you can(under 6kb).