no, i didnt use gelato, because gelato dont use vray. i use vray 1,5 rc2 with max8. i will make tests about this with same settings.
i just made the rivatuner-mod with these 2 cards. the agp asus gone fx4000 fine. pcie msi 6800gt gone quadro fx too, and i can install...
it works fine with pcie msi 256mb 6800gt and agp asus 128mb 6800gt too.
did anybody try NVIDIA SLI with rivatuner quadro-mod???