Hi Maureen,
The VIs located in the "..\OPC" directory are used in some way internally by LabVIEW, DSC, or some component such as Server Explorer, and their functionality is not supported. For the VIs located in the "..\\Srvlibs\_servBrowser", you might refer to viserver.pdf located in C:\Program Files\National Instruments\LabVIEW 6.1\manuals.
Regards,
Remzi A.