I should of mentioned before about vDGA. When testing that config we were only using dual monitors and we did go in through the vclient (console) first and make sure the GPU video card's display was the primary. Then once we connected through the zero client we made sure under resolution/display settings that the Direct-Pass GPU was connected to the display being presented through View. Is this what you were mentioning that is "undocumented". If there are other things to do could you let me know.
With respect to only dual monitors working with vDGA right now I thought that this was really dependent on the capabilities of the GPU being passed through. Are you saying there are other limitations within View itself that would restrict a keplar GPU (capable of displaying four monitors) from displaying all four monitors?
I edited my post above, but basically said I need to go back and test our Quadro 4000 card as we were previously using a V7900 FirePro card. It sounds like nVidia cards may do better with View?