Seth, there seems to be a communication problem as what Don suggested is the way to do it but, for whatever reason, you’re not understanding it.
Vegas can do this very easily without any plugins so let’s go through this step by step and see if we can get you going on it.
#1. Import a picture and drag it up to the timeline.
The default image length is 5 sec.
If you need it to be longer, place the cursor at the right-hand edge of the image and, while holding the left mouse button, drag it longer.
For this example, I’d suggest making it 10 sec. long.
#2. Open the Pan/Crop window.
Move this window over so that you can see the Preview window in Vegas at the same time.
The first frame is automatically a keyframe and any adjustments you make to the image will be the starting point so set the zoom on the image as desired. The “F” will be shrunk and positioned where you want things to start.
#3. Now click the cursor so that it’s at the end of the the timeline.
Move up to the center of the Pan/Crop window, right-click on the image and select “Restore”.
The “F” will now take up the entire image.
That’s it. Close the Pan/Crop window and play it to see if you like the result.
You may need to set the Preview window to Preview/Auto to ensure smooth playback of the zoom out.
If the effect is not exactly what you wanted, open the Pan/Crop window again and adjust as required.