A great posting from 48aerosedan:

i just figured out how to place photo of your car in your posts as an avatar. all my photos were too big and wouldnt work. heres the secret. go to http://www.photosize.com (a free site) and go to custom size and fill in 100 pixels wide--then browse for the photo you want for your avatar. it will resize it to the correct size--then save your photo. then go into your profile and browse until you find the resized photo you saved. bingo you now have your car as your avatar on all your post. maybe everybody knew this but me but if not its easy. David