Emmm, I was a little bit nosy and I've googled your question into this group. It did come to this forum by the past actually. You could have made a little search ;-) Anyway, here is the link ... http://groups.google.com/group/comp.cad.cadence/browse_thread/thread/5af30c81e7e3f699/b5ddb28dac514ef5?lnk=gst&q=spectre+spectres+difference#b5ddb28dac514ef5 Enjoy
