Custom screen saver on Panelview 5310 screen

There is a screen saver function for the Panel view 5310. It utilises a AB logo splash. I would like a custom image to be the splash for the screen saver. The literature seems to suggest you can display a path to the screen saver image. This returns a blank text when i used on the screen. I did load an image into the project, however can find no way to point the screen saver to the image.
Has any one else tried this/had any success with it. Very frustrating. Any help appreciated