crop tool in Powerpoint 2007

I have a need for cropping scanned images of piano music. After finding many graphics and scanner programs outline the crop area with a hard to see hairline or dashed line, I was delighted to find that Powerpoint allows you to create a shape outline and then weight how thick you want the boundary rectangle to be.
So far, I have learned the keystrokes for making the shape outline, making the edges of the rectangle thicker, and activating the crop tool. I was wondering ... to make my life complete, is there a way I can move the cropping tool without using the mouse, just with keystrokes and Jaws?
For example, can I tell it to move the top side down one and a half inches, or move it from Y coordinate 2 inches to 3.5, or something like that? 

Michael



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