Hi Carl,
I think i've got it, but it can be improved.
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//Video
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if ( my_config["aspectratio"] == "16x9") {
local blackscreen = fe.add_image( "black.png", flx*0.048, fly*0.259, flw*0.430, flh*0.434);
local snap = FadeArt( "snap",flx*0.048, fly*0.259, flw*0.430, flh*0.434);
snap.trigger = Transition.EndNavigation;
snap.preserve_aspect_ratio = true;
It's for the PSP Background.
If you want i can share more backgrounds configs to help you finish the job.