http://wiki.radioreference.com/index.php/Popular_Software_for_GRE_Scanners
Go to the above link and look over the software choices for your new toy.
I have only used PSREdit500 & Win500 - both are very good and will make the task of programming your scanner so much easier & enjoyable. ARC-500 is also out there, altho I have no experience with it.
All the software developers offer great support via the
RR Software Forums -
Win500,
PSREdit500 &
ARC-500.
Update your location in your profile to give us an idea about what systems you might have questions about.......trust me, you'll have questions. And remember - the only stupid question is the one you do not ask.
Also a Premium Membership would also be of great help, as you can import straight from the website via the software.
Test drive all the software - they give ya a 30 free-trial period and for $35 any one would be a great investment.....altho I personally use Win500.
Welcome & have fun!