There are some 2nd violins here and there but you can get the exact same thing with any instrument with the transpose/pitch shift. I haven't done it purely within VI, but it can be done without having to transpose written notes by setting your sequencer's MIDI track to transpose itself. Then you can play or write the notes at the correct pitch simply by making the tranpose setting and inserting a single pitch shift at the beginning of the track.
by the way I have noticed that it is better to transpose notes UP, and then pitch shift DOWN. The reason is, the sounds when pitched shifted up are a tiny bit brighter and vibrato/trills/tremolo get faster and more nervous- sounding, not as good as pitch shifting down, which has a more relaxed, natural sounding vibrato and a richer darker timbre. In fact, I think I actually like the pitch shifted solo violin a little better than the "correct" one (sorry - heresy!)