Here is what I want to do with my MURANO. I have a 04 Murano which is prewired for sat. I want to install Sirius Sat. radio and my Kenwood Excelon Music Keg. I want to have these ran off of my factory BOSE system. I also want them both to show the imformation on the factory LCD display. What do I need so it will not cost me $400+ from the dealer and I will not need an FM modulator? I really appreciate any help.