I made this note to myself a while back. NI may have since fixed the problem, or it may have been unique to my situation, but it's worth checking:
"Problem description: After upgrading from LabVIEW 6.0 to LabVIEW 6.0.2, the files used to create an installer for the LV runtime engine through the application builder are still from version 6.0. This may also cause problems if a client computer already has the LVRTE 6.0 installed.
Solution: On development machines, manually replace the LVRTE files used to build the installer. On client computers, uninstall the LVRTE 6.0 and replace it with the LVRTE 6.0.2.
http://digital.ni.com/softlib.nsf/websearch/D5F11A64A905DB27862569EC005E31E2?opendocument&node=132070_US.
Obtain and unzip the 602R
TE.zip file in a temporary directory. Then take the files that result (InstMsi.exe, InstMsiW.exe, lvrt.msi, lvrteinstall.exe, lvrteinstall.ini) and copy them over the files in C:\Program Files\National Instruments\LabVIEW 6 AppLibs\installs. Remember to delete the temporary directory."