The purpose of the f6flpy-x64 drivers are to assist with installation of various Intel based storage features like Intel Rapid Storage Technology (RST) that may need to be pre-loaded at time of boot during a fresh installation of Windows. When Windows is installed, the installation phase loads mainly generic Microsoft drivers to get the system to a GUI state where SSD/HDD and other storage drives can be configured for installation. The f6flpy-x64 drivers need to be extract to a USB flash drive that you can browse to during Windows Setup.
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If the extra performance and security features are needed at the time of Install for RST you should install them at Windows Setup.
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