AlChuck, I've got the same board and went through a major fight getting my IRQ's set up right. And I couldn't figure out that table either.
But here's what I know, the AGP Slot and PCI slot 1 seem to share IRQ 11; PCI Slot 2 unknown, PCI Slot 3 seems to take IRQ 10; PCI 4 seems to take IRQ 9; and PCI Slot 5 unknown (I don't have anything in either Slot 2 or 5).
I could be all wrong about this but that's about as good as I could figure out. I have no idea how this lines up with PRIQ_0 thru PRIQ_3! I do know that I had to assign PRIQ_3 to IRQ 3 in order to get my SoundBlaster Live Value card to go to IRQ 3 and it's in PCI Slot 4.
Ok, now I've got a headache!