If all you have is LabVIEW 8.6 installed on your system you will be able to install the LabVIEW FRC package (from the DVD

) with any conflict issues.
We have seen conflicts on machines that also have LabVIEW Real-Time, Vision, and/or NI-RIO. If you have anything on your machine in addition to LabVIEW Full (drivers, LabVIEW modules, toolkits, etc) I would recommend uninstalling everything before installing the LabVIEW FRC package.
Cheers,
Mark