Put the SB Live in PCI3, and one NIC in PCI4.... for the 2nd NIC you can try 2 and 5.... if its in 5 then 2 NICs will share IRQ along with USB... If you put one in PCI2 it shares with the Promise controller... one of them should work fine. For me personally putting a NIC in PCI2 caused HD corruption during heavy network traffic. But it might work fine for you....