There is an introductory tutorial on how to use Realflow 4 with 3ds max on cg.tutsplus.com. I have to say that there is a desperate need for this kind of tutorial as learning Realflow can be a real biatch! (Realflow is a standalone fluid and dynamics simulation software package, that can import import and export 3d data to various other 3D animation packages, e.g. Autodesk 3ds max, Maya, Cinema4D, Lightwave, Houdini etc.)
Click here to go to the tutorial on cg.tutsplus.com.
Here is my own early attempt at using Realflow :P