Tyson,
Have you looked at the accessories for the 2006 FEH? There is an accessory titled "TripTunes" you would be interested in. It is part number 19C142. The description is as follows: "Take your tunes on the road! Now you can connect most portable audio players (MP3, iPod, iRiver, ScanDisk, etc.) plus portable CD and cassette players, right to your in-dash radio. Just plug your player into the harness - a 3.5 mm stereo connector provides the interface so you can listen to music through the radio's speakers and control the volume. Audio connection is housed securely in your vehicle's glovebox or center console. Base Part No. 19C142."

In the downloadable fordaccessories pdf file, it is on page 6.

Good luck and hope this helps.

Rich