stock headunit

Hello! I'm new here and was unable to find this information in an old post. I just leased a vehicle with naviagation and I want to put my previously used system in the new leased vehicle. I definitly cannot remove the navi because I'll loose almost all functionality of the dash. Is there some...

okay, i have a stock headunit in my 95 infiniti g20, with two 4x6 alpines in the front, and two 6.5 alpines in the back. the car also has two tweeters in the front, I was thinking i want a powered system like the kicker hideaway, they say you can hook up the thing to the rear speakers, then to...