Audio Systems: pick up stereo, ford f 250, factory radio

Question
I just bought a Ford F-250. It has a stock 6 CD changer in it. I was wondering if you can plug in an amp to it and do I need a special tool to get the changer out?

Answer
this are the tools  if is a 1996 to 2003 next time the vehicle year helps

http://www.oemautosound.com/c-173-oem-factory-radio.aspx

and you need thisinterfacefor the rca

http://www.oemautosound.com/pc-575-132-pie-2-channel-high-to-low-converter.aspx