1. Extract the files to a temporary location.
2. Navigate to your /data folder and make a backup of your Textures and Meshes folders. (this could be quite a large backup, so make sure you watch your disk space).
3. Copy the contents of the extracted folder to your skyrim folder.
4. enable TropicalSkyrim.esp and TropicalSkyrim--Birds.esp.
5. if you wish to play with less bloom, then download TropicalSkyrim--LessBloom.esp under optional files.