This is a RS radio, not GRE, however be that as it may...
If you're using either ARC500 or Win500, we have the procedures to load the custom table that you also need for many rebanded systems -their user guides are linked at the bottom of;
Programming Your Radio Shack Scanner - The RadioReference Wiki
(Note: all links are in blue)
While we don't have something for PSREdit500 I'm sure the instructions are similar
Mike