I've done this in a competing product, but I dislike said product and love Vegas Movie Studio.
Linking a second track to a bezier mask works pretty well for adding text or something to track with it. But, what if I want that spot to hold still at a point in the frame? It's a very effective form of stabilization because it stabilizes the frame right where I want it. But, I haven't figured out how to do it in Vegas Movie Studio 16.