I believe the "Add GPIB Hardware" wizard installs drivers only for the devices you specify, so I'm guessing you installed the driver for the PCI GPIB card but not for the GPIB-USB-B device. You should be able to run this wizard (Start >> Programs >> National Instruments >> NI-488.2 >> Add GPIB Hardware) to install the GPIB-USB-B's driver without impacting your DAQ device drivers. Hope this helps!