The only downloadable picture settings I'm aware of for the D3-series cameras are the old D2x picture settings.
If they're not on the Nikon UK website, I can't help you.
They have a portrait, and landscape picture setting download on the Nikon site. i managed to download them last night
Landscape mode increases saturation & contrast, deepens the blacks/shadows and generally makes the shot look more vivid.
I find it a bit OTT and process myself to make something that sits in the middle.