paragon if you're a network engineer then you can handle programming the P2. I recommend downloading Freescan software and watching a few videos on youtube -- any recent Uniden scanner should work -- just search for freescan uniden and you'll probably find a bunch of videos. Once you get familiar with the software (it's pretty basic) the programming will be super easy.
FWIW, monitoring IWN is like watching paint dry. It's 90% encrypted. You might want to consider recording options if you plan to hear anything.
What I do when I go somewhere new is search for all the control channels in my listening area, ie: search 162-174 mhz and see where scanner stops. Press menu, scroll down service search , press eyes scroll to custom search, press eyes you will see 10 search banks pick the one that has or redefine it as your parameter.
Then as devicelab says get freescan (which is what I uses as well) and get familiar with that ,