Hi
I don't know if you're still looking for this,
but here's how I achieved it:
1. Download the mod zip from above
2. In your Applications folder, right-click 'Pokemon Reborn' and click on 'Show Package contents'.
3. Navigate to Resources > Data. Create a 'Mods' folder there.
4. Copy-paste the mod file there. For example, for weather, I copied the 'SWM - SetWeather.rb' file there.