Mike, yes the OP has already done this in step 3)
What he wanted was to re-edit the shape (created in step 2)) after cropping one side of the previously intersected shape with the photo crop. This is done by returning the now clipped object to an editable shape via the 'add shapes' step I've mentioned.
It's quicker and requires less steps than any other method.

In Xara, the (photo) crop tool is non-destructive because it uses a clipping mask. More accurately, it is a clipping tool which is why you can recover the rest of the image when moving the path.