To give yourself a new avatar is a 3-step process:
1. Prepare your image. It must be no bigger than 100 x 100 pixels and must be .jpg, .png, or .bmp format.
2. Upload it to tm-img like you would with any other picture. Go to the BBCode section and copy the image url to your clipboard.
3. Edit your profile, click on the radio button that says to use the new avatar, and paste the link into the box.
If you still can't get it to work, give me a bit more detail as to what stage is failing, and I'll try to figure out what's going wrong.
1986 4/4 VVTi Sport, 2002 LR Defender, 1957 R4 CV, 2005 Ferrari Vipar