Custom HU backgrounds for Alpine

Does anyone know if you can create custom backgrounds for alpine head units? I know you can download like 6 from some ipersonalize.alpine website thing...but what I want to know if anyone has ever actually successfully created their own. The ones your download have a .bmp file path thing but they do not open on ANY photo shop program i've come across. I've created some .bmp images that are the exact size and dimensions as the ones you can download, but it just errors when i try to upload them. Just curious if anyone has had a similiar experience or better yet, been successful in creating their own backgrounds! Thanks!

 

What type of file does it have to be to upload them anyways onto the HU? Would you do it through a cd or a usb?

 

Typically you add it through an SD card or something. I know you're making your own, but one good picture people use is this:

 

It's through USB. They have to be .bmp images. However, i can't seem to get them to actually go through...