Credit for the Pinout diagram goes to Mike Chambers (who made a Memory Card to USB Adapter, but i simply cut out the middleman and hardwired the USB port directly into the controller!) his project can be seen at: http://mesh.typepad.com/blog/2005/01/creating_a_usb_.html
Another helpful resource for anyone undertaking any project using USB will appreciate this site:
http://pinouts.ru/Slots/USB_pinout.shtml This site gives some good visual guides on most things USB (even lists iPod and other proprietary connectors).
Step 1: Shopping List
Soldering Iron (I used a cordless one)
Small Needle Nose Pliers
USB Extension Cable (mine is a dollar store one that cost $1.50)
XBox Controller (S Model is my preference)
Additionally, some experience soldering, as well as stripping wire, and a delicate touch is helpful.
Step 2: Stripping the USB Socket
After this, start slowly trimming off the covering around the socket end. using a quartering technique, crisscross cut the casing and gently (and patiently) pry it off. Do this until you have the socket totally exposed to its metal contacts and wires. If you find 5 wires, you have one too many. One is the ground wire, and can be clipped off (this wire is bare and soldered directly to the metal socket). After this, strip a small end on each of the wires and solder slightly in preparation for a later step.
Step 3: Opening the XBox Controller
Step 4: Removing one of the Sockets
Step 5: Wiring and installation of USB Socket
Now to do the next step will require some soldering, so make sure to be careful to not burn yourself. In the wiring guide enclosed, you will see an explanation behind the five pins. The yellow wire is almost never needed for any reason other than accessories, and is not necessary to this project so that hole will not be used. The wires have to be inserted in from the bottom, which is the same side as the socket that was removed. A good starting point is to have the Green wire soldered to the center hole. Make sure to use some Flux (i spread mine with a paper match end), and extra fine solder. An easy way to know what wire goes where is the following: (with the triggers pointing up) Red White Green Empty Black. The wires should be soldered in through the top of the board, where the other socket remains. Then run some glue along where the wires feed in to keep the wires from snapping off from the board.