Yes, ACPI adds a new PCI device so it is normal. I am interested by any
regression found using the current CVS with ACPI...
I think, this answer is fairly useless for the OP.
So perhaps the OP wanted to ask: how do i tell my Win2k to properly use
the new PCI device?
I'm especially interested in this question: is qemu's current ACPI PCI
device so normal, that it would be recognized and properly used by a
newly installed Win2k?
qemu's ACPI PCI device doesn't seem to be _that_ normal/known. At least
a recent Knoppix lists it as "Bridge: Intel Corp.: Inknown device 7013".