I found the VI-PRO video re "Multi-Instrument Presets - Stacking" to be very informative, especially how to create a realistice orchestral brass section multi.  It got me thinking about how one might create a string section using 4 different versions of chamber strings with slight alterations to sound like richer divisi string sections (e.g., playing a 4-note chord on a keyboard with each note assigned to a unique chamber strings slot.)

Any one have any ideas on teh best way to accomplish this?