I know that there is that many guys that are still using the Livesight (I do) There is something strange with the latest update that comes with the newer Live. I was sure that the Live will be compatible with the Live w/o the PS-1 but it looks that if you update with the non-public yet version: 22.1.1-65.1.37 you will need the PS-1!
Will see if Navico will correct this or not; if not I will be looking for a PS-1