Unzip all files into your folder.

Unzip Replication.zip into the folder Replication

Unzip Create_AgriculturalCensus.zip into the folder "Replication/Create_AgriculturalCensus" 
Unzip Create_AVHRR.zip into the folder "Replication/Create_AVHRR" 
Unzip Create_RainInstrument.zip into the folder "Replication/Create_RainInstrument" 

Note: Create_AVHRR.zip has 8 volumes.