These four files in C:\Matrix Games\Harpoon Ultimate Edition are only temporary in nature and are used by the Installer.
The HUE installer programs (HarpoonUltimate-SetupRelease-v100a, -2, -3, -4, -5) will bring you up-to-date with all the files you need with the exception of this one:ftp://ftp.matrixgames.com/pub/Harpoon-UltimateEdition/Harpoon3UltimateANW-Update-v3101a.zip
That is the only additional patch installer you need to run once you have the four different games installed.
You do not need to individually run the four installation programs found in your C:\Matrix Games\Harpoon Ultimate Edition folder. Running HarpoonUltimate-SetupRelease-v100a.exe should be sufficient.