its easy, soldering kit, a cheap one will run around 10 bucks, i got a iron and shrink tubes from harbor freight, 6 bucks for both and solder from radio shack for 5 bucks.

the wire for the aux i got from home depot, 2 bucks, they sell it by the foot. the aux port, like the how to says radio shack, 2 bucks. i took the part # in the store and just gave it to the clerk, i let them find it lol

watch some youtube vids and practice some.