Dear Shelly,
I used your shapefiles for athigh and attracks and they worked perfectly!! Thank you.
In the ArcExplorer Online HELP pages, could you write up a "step by step" on how to prepare a shapefile. I was using Arctool box to assign a projection rather than ArcCatalog. Also, what is your best guess for a projection when you don't know it's source? The Atlanta data was from a ESRI Quick Start data set from ArcView 3.
Also, thank you for "being there" for me. This software is so new; there is no one close by to ask for help.
Margaret