I know that sometimes there are several ways to do the same thing in PSP, but this was how I did it:
1. For the diamonds, I traced them from the original using the pen tool onto a separate vector layer (this was the only way I could think of to color (fill) them light yellow versus the original white). It took me some time to do this although it was good practice of techniques learned in early lessons.
2. For the two separate parts of the saucer, I used the rectangle tool to create each part onto two separate vector layers so I could color (fill) each one separately. This was quicker than doing the diamonds (since the shapes were simpler) and, again, gave me some more practice.
If there is an easier way, I would like to know.