The Radio Information Board

So i nelp help, sort of... I'm going to be programming a tk-790/tk-890 dual band with a single head.. 1. is it as easy as reading the radio (or both radios?) making the changes and writing to it (them?)? 2. I see the 90-series is a 160ch radio, if it is set up as dual band/single head, is that 160ch...