[SpookyZalost]

so this one took me like 10 min to make and was one of the first actual hardware mods I ever did.

what you will need.

• Wire Strippers.
  
• Xbox controller dongle (that bit that plugs into the console with the round piece that connects to your controller)
  
• soldering iron (better to use than just twisting wires together... trust me)
  
• Electrical tape/Heat shrink cable sheath/tubing
  
• any old USB cable
  
• 10 minutes of your time.
  

1. take your xbox controller dongle and cut off the end that plugs into the Xbox then use your wire stripper to expose the wires.
   
2. cut the end off your USB cable that doesn't plug into the computer, do the same as above.
   
3. Connect/solder the black, red, green, and white cables to their counterparts on your USB cable and ignore the yellow one (the original Xbox controller is literally USB 1.1 with a custom connector) make sure to slide the heat shrink tubing over your wires first!
   
4. slide the heat shrink tubing over the now soldered connections and use a lighter or heat gun to shrink them tight, do the same with the main cable.
   
5. if windows doesn't automatically detect the xbox controller (possibly as an xbox 360 one) install the XBox Controller Driver (XBCD) from Redcl0ud mod team
   

you'll basically end up with a result like this which works with all OG Xbox controllers, great for making PC game pads on the cheap!   and the best part, you can still use that controller on your XBOX! so enjoy and have fun! 

Edit: I wanted to add that you can do the reverse of this as well with a USB female to Xbox male connector, that way with a modded Xbox you can plug in a keyboard, mouse, Flash drive, whatever and don't need to attach a network cable if that's what you want to do.
the best way to do things is to buy a USB extension cable and just make one of each for that reason.

[Darth-Apple]

Nice! That's the downside to PC gaming is trying to use the keyboard for everything. Does this only work for certain games or does the driver map it to certain keys on the keyboard?

[SpookyZalost]

for the PC? yeah pretty much, you map the gamepad controls to keys on the keyboard, it's great if you've got a game that you want to use a controller on but it doesn't support it outright.

on the xbox however if you want to use a keyboard I believe it's detected like a USB keyboard on PC but only if the game supports it, so like for example if you've got an RPG you can use a USB keyboard to type in the name's of your character or use it for an online game... the keyboard on Xbox is much better for Xbox ports of PC games like doom where you can use a keyboard and mouse on the xbox instead of a gamepad/controller.

[Guardian]

Very nice. Could be a profitable idea for buying up old XBox controllers and converting to PC controllers.