Hello D.
To use the USB-6008, you need to download DAQmx Base driver from the web at http://digital.ni.com/softlib.nsf/websearch/CE3686A8D5B0CEDC86256FFD007C9C4A?opendocument&node=132070_US .
The driver will install with example programs that you can access by going to Start->Pograms->National Instruments->DAQmxBase->Examples. You new to have LabVIEW 7.x to use this driver.
SergesL