Converting to weight mapping is the easy part.  Load V3 and in the Scene tab be sure she is selected.  The is a little icon with a sidways triangle and several horizontal line in the right corner of all tab, when you click on them they bring a bunch of options, these options change depending on the type of tab.  So in the Scene tab click the icon then Edit, Rigging, Convert Figure to Weight Mapping.

Getting clothing to fit is the part I don't know.  I suspect it has something to do with the Transfer utility.