Insatlling a JVC car radio  

I'm trying to install a JVC car radio to my 92 Cadillac Seville. The problem that I'm having is that the wiring is totally different from some cars. Most of the wiring is in the trunk of my car. I'm not sure if I can connect all my wiring from the front, where manufactured radio is located, or do I have to run any wires from the from to the back. I need to have have a wire connected to my steering wheel because it has the control button for volume, mute, seeking radio station, etc. Also I believe tha the wire for the antenna is located in the back, because it automatically goes up or down when radio is turned off or on, but I'm not sure.
I can install on my on, I have insatlled numerous radio's in vehicles before, but not like this. I can't offered to have someone install for me. Can anyone help please.