LabView 6.x comes with VIs to use config (ini) files: from the File I/O palette, goto the Configuration File VIs palette. Look at the examples that ship with LabView: On any LabView menu bar, goto Help >> Find Examples >> Search, then enter config in the box labeled Type a keyword to find.
There are also VIs to use Windows registry: from the Advanced palette, goto the Windows Registry Access VIs.