I am also trying to get the boot image changed. They offer a file "boot screen changer.apk" and the app loads just fine, but the image I choose to load does not load. I sent them a tech support request through contact us. Here is what I sent them. Hopefully I hear something back.
I just purchased one of your PX6 9.0 android radios for my 2012 Ford Mustang. I changed the background image just fine. I am now wanting to change the bootup image. I have my image and it is 1024x768 according to your specs. In cartype I tried to use the load button, but it immediately comes back saying cannot find boot logo file. I tried the boot screen changer.apk and the app loads fine. When I choose my jpg or png file to load it appears to do nothing and goes back to the boot screen changer app page where I click the button to choose a file. I would expect my image to show up or a save option, but I get nothing. Please help me in trying to get my image loaded.