Browsing through the site I saw a screenshot depicting a range map for an MD-80 centered on a Texas location. This would be a useful tool for route planning but after a bit of hunting I have been unable to find where I can generate such a map for other aircraft and locations.
See Screenshot :)
(https://www.airwaysim.com/forum/proxy.php?request=http%3A%2F%2Fi1009.photobucket.com%2Falbums%2Faf216%2Fd2031k%2FRangeMap.jpg&hash=73d500be5c2fc2b16dcfba94d97a6a4634d67d99)
Thanks for the speedy response. I had just located that page and link myself and was coming back to this topic to post the result but you beat me to it!