I assume that you are using the s70 as a "master" controller for your lighting system. Add in the new switches/dimmers to the Nevo software and then when you fire up the remote with the new program follow the instructions on the remotes screen to associate the dimmers/switches to the simple names that you gave them in the software.
The remote will now control the new dimmers. You can use a macro to set a particular scene.
If the lights that are in the kitchen and living room on a different circuit you will have to read the setup of the lighting control system to see what you will need to set lighting scenes without a remote. Most likely you will need a scene controller installed and usually they need the lighting control manufacturers controller/software/dongle to set that up.
