Seriously...
PietroNifosi is totaly right...
Do a web search for Mystymood...
It's woderfull...
All the info is there and you can also use the art work...
I use the "Dynamic Sky" in my projects...
Simply Do a "Save As" and take out what you don't want and add your stuff...
It is an excelent way to start a new project...
Widi is totaly right about moving the terrain for creating puddles...
I saw it done like that, somewhere, for wave action, I think in Mystymood's shore break???
Best of luck!