So with either the 436 or the 536 I thought I could just input my zip code and be done. I guess there will be a lot more to this then what I was hoping. I probably like most of you do not want to hear the meat person at Big Y or a gas station attendant talk to someone. I am predominantly looking to hear any and all emergency calls... fire, police, EMS, security at casinos, (casino police, fire & EMS) etc. Will I be able to separate the BS out by doing the zip code version or will I have to buy software to do it from the computer and if I do it from the computer does it save what I have for frequencies on the computer as ones that I am using in my area and those that are available but not using so that I can pick and chose what I want to hear?