Lore,
I found out a little more for you. Don't disable ACPI with your Mobo. If you do, you will lose many valuable assets like, suspend to ram, stand by, resource management...amoung others.
Your moving of IRQ and PCI placement will not help you until you reinstall Windows clean. I was reading a bulletin from M$ that stated once XP assigns a resource (to your Live for example) no matter of reassigning that item will work until you reinstall. Its a limitation of ACPI and WinXP which evolves every day. It was never fully realized in Windows until XP.
So the method I mentioned earlier may well work for you. It just may have to wait until your next reinstall to confirm it.
BTW, these new Compaq drivers seem to solve a lot of resource sharing problems with the Live and Audigy in XP.