Audio Systems: Installing a new head unit!, jeep grand cherokee, infinity gold

Question
I have a 1998 jeep grand cherokee limited edition with a infinity gold setup.I want to install a new head unit however,i mwas told that i will lose my factory amp and have to rewire everything...is there a way i could get around all that and keep my factory amp with a new head unit?

Answer
there is a small adaptor that you can wire from the new  radio to the factory wiring   and you keep all the amplifier and speaker
sorry i don't remember the part number but it is made  by  PIE and works with bose aand infinity systems  

call oemautosound they carry that interface and it is  not to expensive

good luck