Unfortunately, NI does not have an instrument driver available for this particular instrument. I might suggest contacting the vendor to see if they have any developed.
Also, if you have the latest patch/update to LabVIEW 6.0, you can use simple coersion or typecasting to push a string VISA Address to the VISA I/O type.
Ryan Mosley
National Instruments, Applications Engineer
http://www.ni.com/exchange