All tests made in Windows XP XP3.
Native usbport.inf from Windows 7 has information from both Q45 and Q33 chipsets at section
[Intel.Section.NTx86]
(...)
%PCI\VEN_8086&DEV_2934.DeviceDesc%=UHCI.Dev,PCI\VEN_8086&DEV_2934
(...)
%PCI\VEN_8086&DEV_3A64.DeviceDesc%=UHCI.Dev,PCI\VEN_8086&DEV_3A64
(...)
both are UHCI.Dev, but Intel infs tell OHCI.Dev...