Tyrese Brown

Hey guys, just got my account and I'm new to the forums. I got a 03 f150 xlt and I want to add a 3.5-millimeter headphone jack, but I don't want to add a new stereo, or completely destroy this one. I'm willing to buy cables or harnesses, pretty much I'm looking for the simplest, easiest and cheapest possible way for me to play music from my phone through the speakers. I'm kinda slow, so making your instructions idiot-proof would be great.

Example of my stereo (in black tho) : http://img0122.psstatic.com/18065239...wn-car-cd-.jpg