I dont know, I searched online for AV's and saved a few I liked. When I tried to attach them it said they were not jpeg or somthing, it was a few days ago so my memory has faded, but I do remember they were AV's from other websites.
I turn any pic that isn't already jpeg to it in my Paint program. Do you have that? I'm not sure of other methods. Paint is good for sizing pics to make them Avs too.