Got it...I was doing something stupid.

When I was zooming in, I was using the "zoom all quadrants" setting.

Turns out, the textures only show in the lower right quadrant. Since I was zooming them all together, and kept zooming until the model showed in the other three quadrants, I was zooming right past the picture with the textures.

Umm...err...they were there all the time.

Told you it was stupid.

Now, about 90% of the models open with texture. A few still don't, and show up black. I suspect it has to do with differences between the names of the texture and model files. I assume there has to be some congruency.