The option above specifies the IP address of the machine where the printer is connected to. It now works without any problems. These will work over an FM radio channel. Not blazingly fast. Hope this clears up some points.
Some people like it.
I can't personally vouch for it. MicroImages provides it as part of the Windows support of its GIS software. X-WinPro is shareware. Personally I've found it useful. I have looked high and low and can't find one.