Heres something I found in the everyday screenshot thread.
I'm not sure who made it and can not seem to find it again to give credit where credit is due but here it is for your own personal use.
You can copy and paste it right into your Ah folder where the other Jpegs are from here i think. If not just save it and make sure it's named AHlogo. You will then see it on log in. Of course you can do it with any picture on your computer if you don't like this one...but give it a shot anyway especially if you like the F6.
IT LOOKS GREAT!