dont know if this has been posted before but i looked and couldnt find anything...but heres my problem...
Ive replaced the stock HU with a panosonic one and everything works except for the CD Changer...how do i get this to work and is there anything i need to get this to work with my new HU....

 

Since there is no industry standard for digital protocol you cannot use the factory changer with an after-market HU. There are adapters that will let you use an after-market changer with the factory HU but none that work the other way around.