If you click on "User CP" in the first purple bar under the web banner, then click on "Edit Avatar" on the left hand side, it will take you to where you need to go. For the avatar, it needs to be a smaller sized picture (I am not sure the exact dimensions). If you have a large picture, then you will have to edit it and change the size. After doing that you can upload the edited image as your avatar.
I don't think that avatars will let you click on the picture, but I am not 100% on that. One way you can be sure it won't link it to the photo album is to put the edited picture in a seperate subfolder on photobucket.
There might be an easier way, but this is the only way I know how for sure.
HTH!
~Elle
DS1: 10/08 (the “tenager”)
DS2: 07/18 (the wild one)