Merge the GameData folder with your Kerbal Space Program/GameData folder.

The ScienceParams.cfg file must be in the proper location to function correctly:

Kerbal Space Program/GameData/ScienceParamLoader/ScienceParams.cfg

Extra config files are provided in the Alternate Config Files folder.
Copy the desired ScienceParams.cfg file and copy it over the default file found in the directory shown above.

Edit the values in the cfg file to the desired amounts.

Values can be reset by deleting the mod folder or the ScienceParams.cfg file, or by editing the values back to their defaults.