define my own DEFINE macro? to model pithing naca
 

Hi everybody! Can I define my own DEFINE macro other than the supplied FLUENT ones? along with its own variables ? I need that for defining the movement of a rotating and pithing naca foil (2 rotating movements= one (rotation) over an axis which is external to the body, the other (pithing) is a rotation of the naca over itself at a point located at 1/3 chord length) this is not possible to do with the DEFINE_CG_MOTION macro provided with FLUENT which allow only one mvt of rotation of the centre of gravity along with one mvt of translation. thanx for any help.