It would be great if there could be a way to program a button to toggle AutoAdvance. I think it would be relatively easy to do, simply by allowing the Keyboard Shortcuts dialogue to accept "CapsLock" as a function, and then assigning that shortcut to a button. Unfortunately, I'm not a programmer so I don't have any suggestion on how to change the code to do that.
Likewise, it would also be great to be able to assign the "email photo" function to a button.