Jam Pack Symphony - how do I get a "string quartet" sound?

At first I didn't understand the suggestion to search, since I had been looking in the Software Instrument tab of the Track Info dialog, and there is no search field there. Then it occurred to me to search under the Loop Browser, where I found a Real Instrument loop called "Reception All" that is the same as the "Reception" sound sample on the Jam Pack Symphony Orchestra web page. The same clip was also available as four separate loops called "Reception Cello 01", "Reception Viola 01", "Reception Violin 01", and "Reception Violin 02". I found several other string quartet clips in the same format.

Now I know that I can play short, pre-recorded clips of a string quartet... but what I was hoping was that the Jam Pack would include solo violin, solo viola, and solo cello as Software Instruments, so that I could play string quartet music of my own choosing via MIDI input. Given that Apple's demo was just a loop, I have a hunch that what I want to do is not supported by the Jam Pack. Can anyone confirm this?

Here is what I see in the Track Info window, under the Software Instruments tab, if in the pop-up menu at the top I select "Jam Pack 4 - Symphony Orchestra", and in the list at the left I select "Strings":
Orchestra Bass Section
Orchestra Cello Section
Orchestra Harp
Orchestra String Ensemble
Orchestra Viola Section
Orchestra Violin Section 1
Orchestra Violin Section 2
Xtra Bass Section Legato
Xtra Bass Section Pizzicato
Xtra Bass Section Staccato
Xtra Bass Section Tremolo
Xtra Bass Section Trill 1
Xtra Bass Section Trill 2
Xtra Cello Section Legato
Xtra Cello Section Pizzicato
Xtra Cello Section Staccato
Xtra Cello Section Tremolo
Xtra Cello Section Trill 1
Xtra Cello Section Trill 2
Xtra String Ens Legato
Xtra String Ens Pizzicato
Xtra String Ens Staccato
Xtra String Ens Tremolo
Xtra String Ens Trill 1
Xtra String Ens Trill 2
Xtra Viola Sect Legato
Xtra Viola Sect Pizzicato
Xtra Viola Sect Staccato
Xtra Viola Sect Tremolo
Xtra Viola Sect Trill 1
Xtra Viola Sect Trill 2
Xtra Violin Sect 1 Legato
Xtra Violin Sect 1 Pizzicato
Xtra Violin Sect 1 Staccato
Xtra Violin Sect 1 Tremolo
Xtra Violin Sect 1 Trill 1
Xtra Violin Sect 1 Trill 2
Xtra Violin Sect 2 Legato
Xtra Violin Sect 2 Pizzicato
Xtra Violin Sect 2 Staccato
Xtra Violin Sect 2 Tremolo
Xtra Violin Sect 2 Trill 1
Xtra Violin Sect 2 Trill 2

As you can see, all of these except for Orchestra Harp are not solo string instruments, but rather "sections" or "ensembles".