28. The system of claim 27 wherein: the editing the first file comprises adding text corresponding to at least one behavior.
28. The system of claim 27 wherein: the editing the first file comprises adding text corresponding to at least one behavior. 29. The system of claim 28 , wherein: the text comprises at least one parameter; and the adding step comprises: prompting for a value for each of the at least one parameter; receiving the value for each of the at least one parameter; and substituting the value in place of the parameter to which the value corresponds.