Here's another example, with a way that you can use multiple image points:http://dl.dropbox.com/u/5868916/ImagePoints.cap
Check out the private variables on the individual satellites, and the image points on the orbit object. The strings match, so you can use that with a 'for each' condition to easily set them all to the correct position.
Also be sure not to include quotes around the strings in variable editors for private and global variables, but do use them in any expressions in your actions. Construct is a bit ambiguous there.