What kind of changer do you have. You can usually find a head unit that will operate the changer. That is not the hard part. The hard part sounds like you will have to alter the replacement radio dash. That could get messy. I will soon be adding a LCD screen to my dash in the stock double din opening. I already have the dash that I need because I did not get the RF radio. I think there is a guy on ebay selling dash kits for the Titan. I will check it out and let you know.
M4ck
M4ck