i'm trying to but dont know how.

Displays a small graphic image below your details in posts. Only one image can be displayed at a time, its width can be no greater than 80 pixels, the height no greater than 80 pixels, and the file size no more than 10 KB.

make picture within size&height req'ments, save to computer... and where you edit your profile, upload the picture.

if you don't know how to make a picture or take one to resize and edit using photoshop or something.... i would have to do it for you... since there's no hope if you don't know how...

haha.. j/k.. there's hope.. but it'll take forever to explain.

what kind of avatar do you want

^

What he said...
Plain Graphic or Animating?

I just want a picture from one of my files or one of the car avatar's

Go to your profile page by clicking the grey PROFILE button near the top-rigth side of the page.

Under "ALNCHBX's Vitals" you should see where your avatar SHOULD be displayed. If you click on that grey box you can upload a new avatar or select a standard one.