Well,  It turns out that dynamic hair is really an "obj" file that uses "line" data instead of "face" data.  With some creative use of a text editor you can extract the hair object from the ".hr2' file, find&replace ALL instances of the letter "l" with the letter "f" , then load the object into your favourite 3D modeling progam   (I guess if your 3d modeling program can load OBJ line data,  then this part may not be required, however,   my 3D program, Silo2,  only sees face data.)

Make your styling in the modeler,  export,  change ALL instances of the letter "f" back to "l" (again depending on your modeler) , then re-insert the new hair object data back into the ".hr2" file - being carefull to observe the indentation ( find&replace can help you there as well.)  (I suppose a Python script could be writen to help automate the back and forth. )

It's quite do-able, and with some practice you should be able to make stuff never seen before.

(see images)