Hi,
I did a search on www.ni.com/idnet (instrument driver network)for hp662xa:
http://search.ni.com/query.html?lk=1&col=alldocs&nh=500&rf=3&ql=&pw=595&qp=%2BContentType%3AInstrumentDriver&qt=hp662xa&layout=IDNet
I believe the driver you're talking about is the IVI driver. There are also two traditional (older) instrument drivers.
DiegoF.