Whistler WS1065 is the Model. I want frequencies for Northumberland County
If you are asking about software, that will be an additional cost. Win500, ARC500, or PSREdit will work to program that scanner. All will import from the RRDB if you have the membership and all have a free trial period so you can evaluate before you buy. You will also need a programming cable, which is an additional cost as well. It's available through Whistler or can often be found used on eBay.
I know this is all bad news, more money needing to be spent to get it done...the alternative is manually programming the scanner, which will cost nothing as you can look at anything in the DB for free. Here's a link to the easier-to-read manual which will help with figuring all of that out.
Easier to Read Pro-651/652/106/197 - WS1040/1065 - PSR 500/600 Digital Scanner Manual
They are good scanners, within their limitations. I have the Pro-197 which is the same thing with a different name on the case. It's my favorite for decode quality and audio. Good luck and let us know what you decided to do and how it worked out.