How to model a water turbine in "Blender 2.49b"?

I am not sure what design of water turbine is good for interaction with SPH particles in a fluid dynamics simulation program. Can someone point me in the right direction for designing a water turbine for interaction with SPH particles?
Is Blender 2.49b an acceptable modeling program? Or should I look for more powerful software? I can import STL's into blender easily.

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