Nice work Spock1108!
You made several mistakes. First, you didn't specified correct tile resolution in the script. times are 130 * 130, but in scripts they are 258*258:
Why did you used 130? Good value is 258. Can you reprocess the original raw textures?
Second, if you making a mod, why not call it with your name? Replacing default files is bad practice. Call folders "Bump-fake-Spock" and "Surface-Spock" and don't forgot to make corresponding changes in the script.
Third, why not using pak files? This is easy: just compress Bump-fake-Spock and Surface-Spock with any zip archiver (set compression mode "none" or "store") and rename them from .zip to .pak (more about pak files here)
Fourth, elevation map have some strange shift on adjacent tiles:
Did you made some post-processing after using CubeMap?
Also, your maps have only "2k" effective resolution (ie original cylindrical texture is 2048 * 1024), while default SE maps are 8k (8192 * 4096). I may send you my original maps, so you could patch them with radar data to obtain new 8k maps.