Not sure what a PSR-500 has a "Roam" option is but with the Pro96 you have 10 banks for scanning. the only requirement i found was that when you program a bank of Freq. you can only program a system wuth only one Control Channel. What i have done For the Washington DC area is i have set each bank with a city (Alexandria, Fairfax, Washington DC,) we have all switched to Digitial Trunking and the Pro 96 is great for that. I listen a lot to Alexandria Va Police whick is in the 800 Mg rand and i added Va State(159.000) in the same Bank It picks up both great. I hope this helps you, I am pretty new to this type of scanning....
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