Newbie Question: How to move the underlying image, not the frame.

           var myImage = myImgRectangle.place(new File('C:/path/image.pnf), [50, 50]);
          myImgRectangle.geometricBounds = [y, x, y2, x2];

How do I move the image (like panning it using the center circles in Indesign CS5), but not move the frame? 

myImage.move([x,y]) doesn't seem to work.  Neither does the place method.

I am using Indesign Server CS5

You help is much appreciated,  I'm so stuck.