how do i change the pioneer startup screen on my avic-x1bt, i think that's the american equivalent of avic-n1.

any ideas?

As I understand, it's only possible on the newer models.

I remember that I changed it at one time, when I first installed it 3 years ago. I remember having my 2 images saved to a CDR in a directory called /BG after that I can't remember. I want to update mine in the next couple of days.