need adaptor!
#1
#2
I would say you are probably out of luck. The factory changer is made by Clarion and is modified to "speak" the Visteon (Ford OEM) protocol. The only adapter I am aware of is one that works with some of Kenwoods HUs. Crutchfield sells this item when they can get them in stock. I do not know of any Pioneer adapters.
#3