not sure what your CAD/CAE capabilities are...
this is what i would do.
1. Use Meshlab (free) or Solidworks (not free) to process the point cloud data.
2. Output to a format that Ansys can read 3D data from.
- Workpoints, Surfaces, Solids
3. Add Contraints, Boundaries, etc.
4. ...
5. Profit
While it is possible...you may go crazy trying to develop a mesh using simple commands in Ansys with this kind of data.