Matt,
Here are a few documents that may help:
http://digital.ni.com/public.nsf/websearch/5511A89D43F3EEE386256C2C0078295A?OpenDocument
http://digital.ni.com/public.nsf/websearch/9D497C53EC18298186256AA40063E35C?OpenDocument
The 2nd document has a link to Tektronics website, where I find this Instrument Driver:
http://www.tek.com/site/sw/detail/1,1059,1706,00.html
You're best bet would be to find an instrument driver for CVI.
Matt P.
Applications Engineer
National Instruments
www.ni.com/ask