Your "next question" is a lot of questions!! ;)

Serial control uses completely different code sets from IR. So you need to set up your RS-232-controlled devices as serial devices in NSP, and use those codes. When you do this, there is an area for entering the code set and you then just use the commands (put them on buttons, etc.) the same way you use the IR commands.

You must use the Nevo serial modules; other serial cables will not work. The NC-50 doesn't automatically detect what it's hooked up to....in NSP, you must assign a device (which will be either a serial or IR device) to a specific port on the NevoConnect, so it knows where to send the commands.

The other thing you're asking about is hardwired IR. It uses IR commands, but sends them via wire from the NC-50 to the IR port on components that offer that option. Those cables are cheap and readily available.