Howdy,
Short but sweet!
You could put this all together into a single file. There are a number of "tricks" you can do when using only 16 channels for more instruments, such as:
1. Parts (eg. violas and cellos) where you use the same instrument patch can share a channel (this one you've already done
)
2. For string instruments where you have pizzicato and arco sections, you can use Sound Changes on a single staff (and thus channel) to accomplish the change in sound between the arco and pizzicato. You can use the "Sound Change" tab on Composer to do this.
3. If you want a performance sound difference in a particular instrument (eg. "near" and "far"), you can use either Note Velocities or Volume graphing to achieve the effect, but use a single staff (and channel) to get the performance you want. Then all you need to do is to add the performance note in the score for the musician to let them know how you want it played. (Do note that you'll only keep such free text or other performance annotations in the .not version of the file, not the .mid. The .mid file will perform the same, but the musician won't get to see your text performance directions.)
The Users Guide gives pretty good instructions on how to use the above features. Just click on Help/Users Guide, and use the Index to look them up.
Enjoy!
Sherry