Just wanting to make sure you saw the Dr. Link one, oh yeah, here are the instructions...
Go here...
http://s232.photobucket.com/albums/e...nkadvanced.jpg
There is your Dr. Link (That was the best picture I could find), at the bottom of the page it looks something like this...
Then at the bottom of that box, it says "IMG CODE", copy that text and go into your User CP. Then click on edit avatar, there it will say
"You may upload a new custom image using the controls below. Either enter the URL to the image you wish to use, or use the upload control to upload an image directly from your own computer.
Enter Avatar URL:"
Paste the IMG code that you copied into that box and it should work. Enless you arn't supposed to use that code... if it doesn't work, try taking the "[IMG]" part out of the copied text.