And here you can see the original Alpine splash screen:
Here is the file openingfile.bmp (BMP image, 800 × 480 pixels). If you want to make you own custom one, please be aware you must first build it at 872 × 480 pixels (1.09 anamorphic aspect ratio D1/DV PAL) in indexed colors with a perceptual master palette, before exporting it at 800 × 480 resolution. You can change the default opening image as explained page 21 of ILX-007 owner's manual:
I'm curious what software program you used to create the image. I only have MS Paint available to me... which doesn't have the options you outlined above. I keep receiving the “Connected USB device is not supported” error... which I understand can also mean there is an issue with the image I am trying to use.