Can different parts of the same sketch be used for multiple swept cuts?  If so, how?  Imagine a sketch of two rectangles - a small one completely inside a larger one - drawn on the top plane.  One sketch on the front plane defines the profile to be swept using the larger rectangle as the path.  The smaller rectangle is to be the path for a second sweep, and another sketch on the front plane defines this sweep's profile.  The first sweep work fine - a dialog box opens when I click on the larger rectangle in which I can select a closed loop, a series of lines, etc.  For the second sweep, however, the dialog box never opens and I don't seem to be able to select anything other than the entire two-rectangle sketch.