Hello Steve,
I'm not familiar with the FP120. I assume you are referring to the FP-TC-120. In any case, the FieldPoint driver is backwards compatible and supports all modules that came out before driver was released. Therefore, you should be able to use FieldPoint 6.0 with LabVIEW 8.5.
To download FieldPoint 6.0 you will need to download the
August 2007 Device Driver CD. You can find this on the
Drivers and Updates page by searching for Device Driver. When you install the Device Driver CD, make sure to select Distributed I/O and FieldPoint as shown below.

Please let me know if you have any other questions.
Message Edited by Ching P. on 10-23-2007 09:30 AM
Regards,
Ching P.
DAQ and Academic Hardware R&D
National Instruments