No, sorry i have a 780i and the way it works..
Main VGA card Slot PCI-E #1
Second VGA card PCI-E #3 (for SLI)
Third VGA card PCI-E #2 (For TRI-SLI)
sorry but your Main VGA card(8800GT) has to be in PCI-E slot one, no way around it just the way Nvidia designed it.