Regarding the last part. I would like to put in a couple receive frequencies out of bad. But it doesn't look like the radio will let you do that. Regarding adding additional GMRS channel slots, though legal, I don't think it has the ability to do so. Basically a lot of the discussion based on the CCR/low parts count radios. The Wouxon will let you add additional frequencies, but it costs twice as much, and has more filters in the hard coding to prevent out of band transmission. The RT76P also has fewer keypad menu options (such as scan add/del), but is available in the program. Compare that to the GMRSV1 which has it in the menu on screens, but again, costs a few dollars more. Also, I can't figure out how to get the weather stations programmed.