Thanks JJMack but I don't understand. These are links to Camera Raw updates which I already tried (v6.7 for PS CS5) and got "Update failed" message. I even completely uninstall all CS5 and re-install it from srcatch to make sure Application Manager is OK - did not make any difference, still will not update Camera Raw v6.7 with new plug-ins for D800.
It is weird that for D800 one seems to have to purchase a new PS6 to work with raw files.
Also apparently there is no way to contact Adobe support directly to ask if this is the case or it is somehow should be possible (as I believe it should) to update PS5 plug-ins for D800
Sergey