so i was thinking about getting satellite radio for my 06 gt. it has the shaker 500 system. my questions are: what is needed to add the integrated system in the car so i can use my factory head unit and not an auxiliary separate unit. i work for lexus and when we do a sirius sat install all we have to do is plug 5 connectors into the amp and put the antenna next to the center high mount brake light in the back window. boom done. and what is the price for parts because id be doin it myself.